ImageMagick is a collection of tools and libraries to display and manipulate an image in many image formats.

MySQL (SQL database server) Reference Manuals (different versions and formats; languages: en + de)

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the active development version.

Apache Subversion is a version control system (CVS replacement).

Wine is an Open Source implementation of the MS Windows API on top of X, OpenGL, and Unix. Think of Wine as a compatibility layer for running Windows programs.

GNU uCommon C++ is a portable and optimized class framework for writing C++ applications that need to use threads and support concurrent synchronization, and that use sockets, XML parsing, object serialization, thread-optimized string and data structure classes, etc. (successor of the GNU Common C++ codebase).

ExifTool is a platform-independent Perl library plus a command-line application for reading, writing and editing meta information in image, audio and video files

Asterisk is a software implementation of a telephone private branch exchange (PBX) that turns an ordinary computer into a voice communications server. Release candidate.

Asterisk is a software implementation of a telephone private branch exchange (PBX) that turns an ordinary computer into a voice communications server. Release candidate.

Cppcheck is a static analysis tool for C/C++ code. It checks for memory leaks, mismatching allocation-deallocation, buffer overrun, and many more.

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the current release series.

Open MPI - A High Performance Message Passing Library. Open MPI is a project combining technologies and resources from several other projects (FT-MPI, LA-MPI, LAM/MPI, and PACX-MPI) in order to build the best MPI library available. Release candidate.

GNU Xnee is a suite of programs that can record, replay and distribute user actions under the X11 environment.

XCircuit is a X11 program for drawing publishable-quality electrical circuit schematic diagrams and related figures. It can also be used as a generic drawing program.

XCircuit is a X11 program for drawing publishable-quality electrical circuit schematic diagrams and related figures. It can also be used as a generic drawing program. Development release.

GMP (GNU Multiple Precision) is a library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating point numbers.

GLPI - IT and Asset Management Software (Information Resource-Manager)

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the previous release series.

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics (main library code). Current release.

Asterisk is a software implementation of a telephone private branch exchange (PBX) that turns an ordinary computer into a voice communications server.

Asterisk is a complete PBX (Private Branch eXchange) telephony engine, and telephony applications toolkit (supports Voicemail services with Directory, Call Conferencing, Interactive Voice Response and Call Queuing, ...). 1.8 series release (Long Term Support).

ParaView is a scientific data analysis and visualization application for large data sets. Release Candidate.

Groovy is an agile dynamic (scripting) language for the Java Platform. It has features similar to those of Python, Ruby, Perl, and Smalltalk. Source release.

Groovy is an agile dynamic (scripting) language for the Java Platform. It has features similar to those of Python, Ruby, Perl, and Smalltalk. JavaDoc and online documentation.

Groovy is an agile dynamic (scripting) language for the Java Platform. It has features similar to those of Python, Ruby, Perl, and Smalltalk. Binary release.

XBMC is a software media player and entertainment hub for digital media that plays almost all popular audio and video formats around.

The ATLAS (Automatically Tuned Linear Algebra Software) project is an ongoing research effort focusing on applying empirical techniques in order to provide portable performance. Developer version.

OpenNMS is an effort to build a fully distributed network management platform providing both enterprise and element management capabilities, using Java 2, XML/XSL and other open source projects/tools such as JBossMQ, RRDTool, Tomcat and PostgreSQL.

Ghostscript - PostScript and PDF interpreter. GPL Ghostscript is an interpreter for the PostScript language and for PDF.

Ghostscript - PostScript and PDF interpreter. GhostPDL is an implemenation of several page description languages (like PCL5e, PCL5c and PXL) on top of the Ghostscript graphics library.

Various Domain Name Service (DNS) utilities

TrueCrypt is a software system for establishing and maintaining an on-the-fly-encrypted volume (data storage device).

OTRS (Open Ticket Request System) is a ticket request and email management system to manage customer telephone calls and e-mails.

SmokePing is a network latency logging and graphing system (using MRTG)

Sudo (su "do") allows a system administrator to delegate authority to give certain users the ability to run some commands as root or another user. Release candidate.

Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography (MIT implementation). Maintenance release.

Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography (MIT implementation). Current release.

GTK+ , the GIMP Toolkit, is a library for creating graphical user interfaces for the X Window System. Development release.

Trac is an enhanced wiki and issue tracking system for software development projects. It provides an interfaces to Subversion (or other version control systems).

FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 (formerly known as Fedora Directory Server), MIT Kerberos, NTP, and DNS. Pre-release.

PARI/GP is a computer algebra system designed for fast computations in number theory (factorizations, algebraic number theory, elliptic curves...), but also contains a large number of other mathematical functions.

GTK+ ,the GIMP Toolkit, is a library for creating graphical user interfaces for the X Window System. Old stable version.

The Common UNIX Printing System (CUPS) provides a portable printing layer for UNIX operating systems using Internet Printing Protocol (IETF-IPP) as basis for managing print jobs and queues. LPD and SMB and AppSocket protocols are supported with reduced functionality.

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (documentation of development branch)

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (development branch)

PDL (Perl Data Language) aims to turn perl into an efficient numerical language for scientific computing (similar to IDL and MatLab).

Yacas - Yet Another Computer Algebra System

GLib - low-level core C library used by GTK+ and GNOME. Development version.

GSL Shell is a Lua based command line interface for a collection of numeric algorithms and functions based on the GNU Scientific Library (GSL).

PCRE - Perl-compatible regular expressions

Task Coach is a todo manager to manage personal tasks and todo lists.

GNU ID Utils is a binary file containing a list of file names, a list of tokens, and a sparse matrix indicating which tokens appear in which files (for e.g. to make many text-searching tasks simpler and faster).

MySQL Connector/ODBC is an ODBC 3.5x (Open Database Connectivity) compliant driver for MySQL database server ("MyODBC").

RT (Request Tracker) is a trouble ticketing system.

RapidMiner (formerly YALE) is a knowledge discovery and data mining system. It is available as a stand-alone application for data analysis and as a data mining engine which can be integrated into own products. Source code of the GPL licensed stable version.

redis is an advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

Mercurial is a Source (Version) Control Management system designed for efficient handling of very large distributed projects.

argus - Audit Record Generation and Utilization System (a generic IP network transaction auditing and management tool)

argus - Audit Record Generation and Utilization System (a generic IP network transaction auditing and management tool). Programs that read, parse and process Argus data.

getmail retrieves messages from one or more POP3, IMAP4, or SDPS mailboxes and deliver to a maildir, mboxrd-format mbox file, or external MDA (written in Python)

Zarafa is an Email & Collaboration platform that has a fully MAPI based architecture, making it scalable and compatible with Outlook. Community version.

ZABBIX enterprise-class distributed monitoring solution for servers and applications. Development version.

Apache JMeter is a desktop application to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). Binary distribution (Java).

Apache JMeter is a desktop application to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). Source distribution (Java).

Mathomatic is a portable text mode Computer Algebra System (CAS).

GNU Automake is a Makefile generator (input Makefile.am, output Makefile.in; intended for use with autoconf)

libpng is the reference library supporting the PNG graphic file format.

Bugzilla is an advanced "Defect Tracking System" or "Bug-Tracking System". Stable release candidate.

Bugzilla is an advanced "Defect Tracking System" or "Bug-Tracking System". Stable release.

Postfix is a mail system (an alternative to sendmail).

Postfix is a mail system (an alternative to sendmail). Past supported stable release.

GIMP - The GNU Image Manipulation Program

Miro is a video player and podcast client. It supports most known video files and offers sound and video, some in HD quality.

Terracotta - Clustering technology for Java ("Network Attached Memory", "Distributed Cache"; binary distribution, including Ehcache and Quartz).

Terracotta - Clustering technology for Java ("Network Attached Memory", "Distributed Cache"; source code, including Ehcache and Quartz).

Guile is GNU's extension language library. Guile is an interpreter for Scheme, packaged as a library that you can link into your applications to give them their own scripting language.

Sudo (su "do") allows a system administrator to delegate authority to give certain users the ability to run some commands as root or another user. Release candidate.

Sudo (su "do") allows a system administrator to delegate authority to give certain users the ability to run some commands as root or another user. Stable version (adds support for dynamically-loaded policy and I/O logging modules).

GnuPG - The GNU Privacy Guard (tool for secure communication and data storage). GnuPG-1 - the well known and portable standalone version".

Samba is an re-implementation of the Microsoft CIFS/SMB protocols for UNIX systems. Current stable release.

zlib is a general purpose data compression library

IPFilter is an IP packet filtering (for both inbound and outbound traffic) that provide network address translation (NAT) or firewall services.

gif2png is a GIF to PNG graphics file converter (preserving all graphic information, including transparency).

GNU Emacs - the extensible, customizable, self-documenting real-time display editor.

Git is a distributed version control system designed to handle everything from small to very large projects (like the Linux kernel) with speed and efficiency.

SciTE is a SCIntilla based Text Editor. Scintilla itself is a source code editing component supporting syntax styling, error indicators, code completion and call tips (source code; Linux binary is named "gscite").

Scintilla is a source code editing component (used for e.g. by SciTE).

Git is a fast version control system respectively distributed source code management tool. Documentation (HTML).

Git is a fast version control system respectively distributed source code management tool. Manual pages.

Sudo (su "do") allows a system administrator to delegate authority to give certain users the ability to run some commands as root or another user. Maintainance version.

FFmpeg is a complete, cross-platform solution to record, convert and stream audio and video (including the audio/video codec library "libavcodec").

Koha is a Integrated Library System (ILS). It is designed to manage physical collections of items (books, CDs, videos, reference, etc.).

Visualization Library is a lightweight C++ OpenGL middleware for 2D/3D graphics (based on OpenGL). Documentation.

Visualization Library is a lightweight C++ OpenGL middleware for 2D/3D graphics (based on OpenGL). Dev Milestone version ("relatively stable distribution containing the latest features").

Bacula is a network client/server based backup program

LAME is a high quality MPEG Audio Layer III (MP3) encoder.

VLC (VideoLAN Client) is a multimedia player for various audio and video formats (MPEG-1/2/4, DivX, MP3, Vorbis, Ogg, ...) as well as DVDs, VCDs, and various streaming protocols. Relase candidate.

MySQL Connector/ODBC is an ODBC 3.5x (Open Database Connectivity) compliant driver for MySQL database server ("MyODBC").

RRDtool is a high performance data logging and graphing system for time series data. ("mrtg" successor)

lftp is a command line ftp client (FTP, HTTP, ssl support, background transfer, reget, reput, ...)

GDB is the GNU Project source-level debugger that let you see what is going on inside another program while it executes.

OPeNDAP is a client/server system for making local data accessible to remote locations without regard to the local or remote storage format, architecture, or environment (see also ODC = The OPeNDAP Data Connector).

ViewVC is a browser interface for CVS and Subversion version control repositories. Draft status.

remind a sophisticated calendar/reminder and alarm program.

MIMEDefang uses sendmail's milter interface to intercept, inspect, and modify email messages as they travel through the sendmail server. It can be combined with other mail scanning software for spam filtering, virus scanning, etc.

HSQLDB (HyperSQL DataBase) is a SQL relational database engine written in Java. It supports nearly full ANSI-92 SQL (BNF format) and full core SQL:2008.

Clzip is a lossless file compressor based on the LZMA algorithm. It decompresses almost as fast as gzip and compresses better than bzip2, but requires more memory and time during compression (a C language version of lzip, intended for embedded devices or systems lacking a C++ compiler).

Lzip is a lossless file compressor based on the LZMA algorithm. It decompresses almost as fast as gzip and compresses better than bzip2, but requires more memory and time during compression. Release candidate.

LibreOffice (a fork of the OpenOffice project) is a personal productivity suite for document production and data processing (Writer, Calc, Impress, Draw, Math and Base).

rxvt-unicode is a clone of the terminal emulator rxvt

GNU GLOBAL is a source code tag system that works the same way across diverse environments. It is similar to ctags or etags, but it is independent of any editor.

Perl (Practical Extraction and Report Language) is a high-level, general-purpose, interpreted, dynamic programming language. Development release.

Maven is a software project management and comprehension tool (support for Eclipse and NetBeans). Binary distribution (Java).

Maven is a software project management and comprehension tool (support for Eclipse and NetBeans). Source distribution (Java).

BIRD - a dynamic IP routing daemon supporting all modern routing protocols.

BIRD - a dynamic IP routing daemon supporting all modern routing protocols (documentation).

GnuTLS (GNU Transport Layer Security Library) implements the TLS 1.1 and SSL 3.0 protocols accompanied with the required framework for authentication and public key infrastructure. Current stable branch.

Sage is a software application which covers many aspects of mathematics, including algebra, combinatorics, numerical mathematics, and calculus. It combines the power of many existing open-source packages into a common Python-based interface. Caution: Roughly 250 MB!

Gnuplot is a portable command-driven interactive function plotting program. Release candidate.

OpenSSL - Open Source toolkit implementing the Transport Layer Security (TLS v1) and Secure Sockets Layer (SSL v2/v3) protocols with full-strength cryptography world-wide. Beta version.

xterm is a terminal emulator for X with ISO/ANSI color and vt220 enhancements.

OpenSSL - Open Source toolkit implementing the Transport Layer Security (TLS v1) and Secure Sockets Layer (SSL v2/v3) protocols with full-strength cryptography world-wide (successor of SSLeay).

syslog-ng (syslog "next generation") is a high performance, stable central logging system. Open source edition.

Lzlib Lzlib is a data compression library providing in-memory LZMA compression and decompression functions using the lzip format.

OpenSSL - Open Source toolkit implementing the Transport Layer Security (TLS v1) and Secure Sockets Layer (SSL v2/v3) protocols with full-strength cryptography world-wide (successor of SSLeay).

amavisd-new (A Mail Virus Scanner) is a high-performance interface between mailer (MTA) and content checkers: virus scanners, and/or SpamAssassin. Preview release.

Rsyslog is an enhanced multi-threaded syslogd with a focus on security and reliability. Among others it offers support for TCP, SSL, TLS, RELP and writing to databases. Stable version V5-series.

dCache provide a system for storing and retrieving huge amounts of data, distributed among a large number of heterogenous server nodes, under a single virtual filesystem tree with a variety of standard access methods. Free usage only for academic and non-profit organizations.

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. This archive contains all C source code combined into a single source file (the amalgamation) together with an configure script and makefile for building it.

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. Documentation.

Cassandra is a highly scalable, eventually consistent, distributed, structured key-value store (database). Binary distribution (Java).

Cassandra is a highly scalable, eventually consistent, distributed, structured key-value store (database). Source distribution (Java).

Octave is a high-level language for linear and nonlinear numerical computations mostly compatible with Matlab (note: Octave 3.x is significantly different from Octave 2.1)

Poppler is a PDF rendering library (based on the xpdf-3.0 code base)

OpenNebula is a toolkit for cloud computing to manage the complexity and heterogeneity of distributed data center infrastructures.

Tcsh is a version of the Berkeley C-Shell, with the addition of: A command line editor, command and file name completion, listing, ...

Stunnel - Universal SSL tunnel (works as SSL encryption wrapper) between remote client and local (inetd-startable) or remote server.

ISC DHCP implements the "Dynamic Host Configuration Protocols" for connection to a local network (version 4.2.x, current production release)

XORP is an eXtensible Open Router Platform for IPv4 and IPv6. The supported protocols are currently BGP, OSPF, RIP, RIPng, PIM-SM, and IGMP/MLD.

GRASS (Geographic Resources Analysis Support System) is a raster- and vector-based GIS, image processing system, graphics production system and spatial modeling system.

MRTG - The Multi Router Traffic Grapher (generates HTML pages monitor the traffic load on network-link

Texmaker is a cross-platform LaTeX editor that integrates many tools needed to develop documents with LaTeX, in just one application.

PETSc, the Portable, Extensible Toolkit for Scientific computation, provides sets of tools for the parallel (as well as serial), numerical solution of partial differential equations (PDEs) that require solving large-scale, sparse nonlinear systems of equations.

Heimdal is a free implementation of Kerberos 5 (a system for authenticating users and services on a network). New (features) version.

MySQL - a SQL (Structured Query Language) database server. 5.5.x GA release (for production use).

MySQL - a SQL (Structured Query Language) database server. 5.1.x GA release (for production use).

Wireshark is a network traffic/protocol analyzer (old name was "ethereal").

GNU Stow is a program for managing the installation of software packages. (keeping them separate while making them appear to be installed in the same place for e.g. /usr/local/).

HAProxy is a TCP/HTTP reverse proxy which is particularly suited for high availability environments.

RapidMiner (formerly YALE) is a knowledge discovery and data mining system. Documentation (HTML).

XPaint is a bitmap/pixmap editing tool.

GnuTLS (GNU Transport Layer Security Library) implements the TLS 1.1 and SSL 3.0 protocols accompanied with the required framework for authentication and public key infrastructure. Previous stable branch.

GnuTLS (GNU Transport Layer Security Library) implements the TLS 1.1 and SSL 3.0 protocols accompanied with the required framework for authentication and public key infrastructure. Current stable branch.

bochs is a portable open source IA-32 (x86) PC emulator of the Intel x86 CPU, common I/O devices, and a custom BIOS. Bochs is capable of running most Operating Systems inside the emulation including Linux, DOS, Windows 95/98, NT/2000/XP or Vista.

GNU Core Utilities are the basic file, shell and text manipulation utilities of the GNU Operating System.

Dovecot is an IMAP and POP3 server, written with security primarily in mind.

Inetutils is a distribution of common networking utilities and servers (ftp, tftp, telnet, rsh, rlogin ane more ...)

OpenVAS (Open Vulnerability Assessment System) is a network security scanner (a fork of Nessus)

GLPI - IT and Asset Management Software (Information Resource-Manager). Release candidate.

MariaDB is a database server that offers drop-in replacement functionality for MySQL. MariaDB 5.3 is based on on MariaDB 5.2 and thus on MariaDB 5.1 and MySQL 5.1. It improves performance for subqueries, as well as for joins and single-table queries over large data sets. Release candidate.

NUT (Network UPS Tools) - monitoring and administering UPS (Uninterruptible Power Supply) and PDU hardware

FOX is a C++ based Toolkit for developing Graphical User Interfaces (development version)

HylaFAX+ is a system for sending and receiving facsimiles as well as for sending alpha-numeric pages (fax server).

help2man is a tool for automatically generating simple manual pages from the --help and --version output of programs.

Nmap ("Network Mapper") is a utility for network exploration or security auditing (port scanner). Development release.

Regina is a Rexx interpreter (an easy to use but powerful programming language).

libpcap is a packet filter library used by tools like tcpdump.

tcpdump is a tool for network monitoring and data acquisition.

nmh (new MH) is an electronic mail handling system.

Free Pascal (aka FPK Pascal) is a 32-bit/64-bit pascal compiler for different platforms. The language and the runtime library are almost compatible with Turbo Pascal 7.0 and recent Delphi releases (with the documentation and all necessary tools to build the official releases).

GMT - The Generic Mapping Tools for manipulating geographic and Cartesian data sets

file attempts to classify files depending on their contents (via typical patterns).

Cyrus IMAP (Internet Message Access Protocol) Server. Latest stable/current release.

AutoGen is an automated text file generator to simplify the creation and maintenance of programs that contain large amounts of repetitious text (for e.g. for options processing).

NetCDF (network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. Release candidate.

fping quickly ping N number of hosts to determine their reachability without flooding the network.

Ruby is an interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). Stable 1.8 version.

ZABBIX is an enterprise-class distributed monitoring solution for servers and applications.

VM (aka View Mail) is a mail reader that runs inside GNU Emacs and XEmacs (supports POP and IMAP; source and compiled code for Gnu Emacs 23).

Sylpheed is an X11 e-mail client (and news reader) based on GTK+. Development version.

Gutenprint (Gimp-Print) is a collection of very high quality printer drivers for UNIX/Linux (plugins for GIMP2, driver for CUPS and GhostScript)

NTP - the Network Time Protocol (Version 4)

TIN is a threaded NNTP and spool based UseNet newsreader.

R (also known as `GNU S') is a system for statistical computation and graphics.

LibTIFF - TIFF (tag image format) library and tools

Bonita Open Solution - Business Process Management and Workflow Software (platform independent)

OpenVPN - a secure IP tunneling (Virtual Private Network) daemon. OpenVPN supports SSL/TLS security, ethernet bridging, TCP or UDP tunnel transport through proxies or NAT, support for dynamic IP addresses and DHCP.

VLC (VideoLAN Client) is a multimedia player for various audio and video formats (MPEG-1/2/4, DivX, MP3, Vorbis, Ogg, ...) as well as DVDs, VCDs, and various streaming protocols.

Icinga is an enterprise grade open source monitoring system which keeps watch over networks and any conceivable network resource (a backward compatible fork of Nagios). New Web Interface.

ATK is a API (toolkit) for GNOME/GTK+ Accessibility. Development version.

Mono - a development and runtime environment for .NET client and server applications on Linux, Solaris, Mac OS X, Windows, and Unix. Stable sources.

Asterisk is a complete PBX (Private Branch eXchange) telephony engine, and telephony applications toolkit (supports Voicemail services with Directory, Call Conferencing, Interactive Voice Response and Call Queuing, ...). 1.6 series release (no longer supports Zaptel but only DAHDI).

GTK+ , the GIMP Toolkit, is a library for creating graphical user interfaces for the X Window System.

vsftpd is a "secure, fast and scalable" FTP server

SOFA ("Statistics Open For All") is a statistics, analysis, & reporting program.

Maxima is a Lisp based computer algebra system (doing mathematics calculations, symbolic manipulations, numerical computations and graphics)

Zsh is a powerful UNIX command interpreter (shell). Documentation.

Zsh is a powerful UNIX command interpreter (shell).

newsyslog is a portable and enhanced version of syslog.

Claws Mail is an email client (and news reader): Extra Plugins (like an RSS aggregator, calendar, or laptop LED handling)

Claws Mail is an email client (and news reader), based on GTK+ (previously known as Sylpheed-Claws)

Apache Hadoop is a software framework that allows for the distributed processing of large data sets across large cluster built of commodity hardware (implementing a computational paradigm named Map/Reduce, and providing a distributed file system named HDFS). Binary distribution.

Apache Hadoop is a software framework that allows for the distributed processing of large data sets across large cluster built of commodity hardware (implementing a computational paradigm named Map/Reduce, and providing a distributed file system named HDFS).

GNU Midnight Commander is a feature rich full-screen text mode file manager.

MongoDB is a high-performance, dynamic-schema, document-oriented (NoSQL) database combining the best features of JSON databases, key-value stores, and RDBMSes.

wxWidgets is a C++ cross-platform GUI toolkit (for Windows, OS X, Linux and UNIX as well as several mobile platforms). Development Release.

Erlang/OTP is a development environment for building distributed real-time high availability systems. Erlang is a general-purpose programming language and runtime environment. OTP (Open Telecom Platform) is a large collection of libraries for Erlang to do everything from compiling ASN.1 to providing a WWW server. Documentation (HTML)

Erlang/OTP is a development environment for building distributed real-time high availability systems. Erlang is a general-purpose programming language and runtime environment. OTP (Open Telecom Platform) is a large collection of libraries for Erlang to do everything from compiling ASN.1 to providing a WWW server. Source code.

Open MPI - A High Performance Message Passing Library. Open MPI is a project combining technologies and resources from several other projects (FT-MPI, LA-MPI, LAM/MPI, and PACX-MPI) in order to build the best MPI library available. Release candidate.

Qt is a comprehensive C++ application development framework. It includes a class library and tools for cross-platform development and internationalization. It simplifies the task of writing and maintaining GUI applications (open source edition, for Linux/X11).

Nmap ("Network Mapper") is a utility for network exploration or security auditing (port scanner).

Spring Framework is an application framework for the Java platform and .NET Framework (community edition)

Lua is a fast, light-weight, embeddable scripting language designed for extending applications.

GIMP - The GNU Image Manipulation Program. Development snapshot.

QGIS (Quantum GIS) is a Geographic Information System that supports vector, raster, and database formats.

Pidgin is a chat program (multi-protocol instant messaging client) which lets you log in to accounts on multiple chat networks simultaneously (old name "gaim").

Doxygen is a source code documentation generator tool for C++, C, Java, Objective-C, Python, IDL (Corba and Microsoft flavors), Fortran, VHDL, PHP, C#, and to some extent D. Different output formats are supported.

PuTTY is a free implementation of Telnet and SSH for Windows and Unix platforms, along with an xterm terminal emulator.

TAU (Tuning and Analysis Utilities) is a portable profiling and tracing toolkit for performance analysis of parallel programs written in Fortran, C++, C, Java and Python.

TAU (Tuning and Analysis Utilities) is a portable profiling and tracing toolkit for performance analysis of parallel programs written in Fortran, C++, C, Java and Python. User's guide (PDF).

pylint analyzes Python source code looking for bugs and signs of poor quality.

RLaB (rlabplus) is an interactive, interpreted scientific programming environment which provides fast prototyping and program development.

FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 (formerly known as Fedora Directory Server), MIT Kerberos, NTP, and DNS.

PostgreSQL Object-Relational Data Base Management System (DBMS), supporting almost all SQL constructs, including subselects, transactions, and user-defined types and functions.

maildrop is a mail delivery agent with filtering abilities (similar to procmail)

The Courier IMAP server is a scalable, enterprise IMAP server that uses Maildirs.

The Courier mail transfer agent (MTA) is an integrated mail/groupware server that provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework.

Pure-FTPd is a "fast, standard-conformant" FTP server. Snapshot release.

The Advanced Bash Scripting Guide is an in-depth exploration of the art of shell scripting. Development version (PDF format; roughly 950 pages!).

PostgreSQL Object-Relational Data Base Management System (DBMS). Documentation (PDF, A4 format).

Icinga is an enterprise grade open source monitoring system which keeps watch over networks and any conceivable network resource (a backward compatible fork of Nagios). Core components with Classic Web Interfaces.

gv is an X11 ghostscript frontend (based on ghostview)

The ROOT system - an OO framework for large scale scientific data analysis and data mining (production version)

clang is an LLVM front end for the C, C++, and Objective-C languages. Clang aims to provide a better user experience through expressive diagnostics, a high level of conformance to language standards, fast compilation, and low memory use.

The LLVM is a collection of modular and reusable compiler and toolchain technologies.

Icinga is an enterprise grade open source monitoring system which keeps watch over networks and any conceivable network resource (a backward compatible fork of Nagios). Reporting module.

The Lazarus IDE is a visual programming environment for the FreePascal Compiler (fpc). It supports the creation of self-standing graphical and console applications and runs on Linux, FreeBSD, MacOSX and Windows. Development snapshot.

CinePaint is a motion picture editing tool primarily used for painting and retouching of movie images (was "filmgimp").

GNU Typist is a unuversal typing tutor.

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics (main library code). Current release.

OpenLDAP is a suite of the Lightweight Directory Access Protocol (v3) servers, clients, utilities, and development tools. Latest release.

LyX is an advanced document processor that produces high quality, professional output using LaTeX, an industrial strength typesetting engine, in the background.

TkDiff is a graphical "diff" utility (compares two files).

FreeMat is a free environment for rapid engineering and scientific prototyping and data processing (similar to MATLAB and GNU Octave). It provides visualization, image manipulation, and plotting as well as parallel programming.

Netpbm is a toolkit for conversion of images between a variety of different formats, as well as to allow a few basic image operations (a successor to Jef Poskanzer's PBMPlus package) - super stable version

ELS is an Enhanced LS look-alike with many additional features

Gifsicle is a UNIX command-line tool for creating, editing, and getting information about GIF images and animations.

Pango is a library for laying out and rendering of text, with an emphasis on internationalization (an offshoot of the GTK+ and GNOME projects).

GNU Binutils are a collection of binary tools. The main ones are "ld" the GNU linker and "(g)as" the GNU assembler.

ircII is an IRC (Internet Relay Chat) client.

VisIt is an interactive parallel visualization and graphical analysis tool for viewing scientific data.

lesspipe is an input filter for the pager "less" to view files with binary content, compressed files, archives and files contained in archives.

GNU grep prints lines containing a match to a specified pattern.

wdiff is a front end to GNU diff for comparing files on a word per word basis.

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (documentation of current stable release)

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (note: HDF5 and old HDF versions are NOT compatible; current stable release; source)

Boost provides free peer-reviewed portable high-quality C++ source libraries.

LAPACK - Linear Algebra PACKage. A transportable library of Fortran 77 subroutines for solving the most common problems in numerical linear algebra: systems of simultaneous linear equations, least-square solutions of linear systems of equations, eigenvalue problems, and singular value problems.

GNU dbm (GDBM) is a library of database functions that use extensible hashing and works similar to the standard UNIX dbm.

Gnuplot is a portable command-driven interactive function plotting program (documentation; PDF format).

Gnuplot is a portable command-driven interactive function plotting program.

xlockmore is an X11 display locker/screensaver

GLib - low-level core C library used by GTK+ and GNOME.

ProFTPD is a highly configurable FTP server software (with FTPS and SFTP support).

ParaView is a scientific data analysis and visualization application for large data sets.

Wireshark is a network traffic/protocol analyzer (old name was "ethereal"). Development release.

GOsa provides a framework for managing accounts and systems in LDAP databases.

Apache Tika is a content analysis toolkit that detects and extracts metadata and structured text content from various documents. Source archive.

Apache Tika is a content analysis toolkit that detects and extracts metadata and structured text content from various documents. Runnable jar file.

Tcl v8.5 (HTML documentation).

Tcl v8.5 (tool command language). Latest stable release.

Tk v8.5 (X11 toolkit implemented with the Tcl scripting language). Latest stable release.

GiNaC (GiNaC is Not a CAS (Computer Algebra System)) is a C++ library for symbolic calculations.

The Lazarus IDE is a visual programming environment for the FreePascal Compiler (fpc). It supports the creation of self-standing graphical and console applications and runs on Linux, FreeBSD, MacOSX and Windows.

QtiPlot is a program for two- and three-dimensional graphical presentation of data sets and for scientific data analysis (commercial support available).

Samba is an re-implementation of the Microsoft CIFS/SMB protocols for UNIX systems (now with "experimental" SMB2-support).

IMAL (Image Analysis and Measurement Lab) is a scientific image analysis program that allows you to create, edit, analyze, and produce color prints of images (formerly tnimage).

RHQ is an abstraction and plug-in based systems management and monitoring suite that provides extensible and integrated systems management for multiple products and platforms (for e.g. JBoss-based middleware applications, PostgreSQL, Apache, ...).

Ruby is an interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). Stable 1.9 version.

ne - The nice editor

Bazaar is a decentralized revision control system (GNU project, written in Python). Stable release.

Lzlib Lzlib is a data compression library providing in-memory LZMA compression and decompression functions using the lzip format.

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Current release series (containing substantial new functionality not available in previous GCC releases).

Cfengine is a configuration management system for configuring and maintaining Unix-like computers (using an own high level policy language).

Tk is a Perl interface to Tk8.x (a Graphical User Interface ToolKit)

The Xen hypervisor is a virtual machine monitor for x86, x86_64, IA64, PowerPC and other CPU architectures that supports execution of multiple guest operating systems in isolated environments

Activiti is a light-weight workflow and Business Process Management (BPM) platform targeted at business people, developers and system admins.

Fe is a small and easy to use folding editor.

ICU IBM's International Components for Unicode (ICU) - C and C++ library documentation (stable release; HTML format)

ICU - IBM's International Components for Unicode (ICU) is a C and C++ library that provides robust and full-featured Unicode support on a wide variety of platforms (stable release).

JCIFS is a client library that implements the CIFS/SMB networking protocol in 100% Java (CIFS is the standard file sharing protocol on the Microsoft Windows platform).

GNU libtool is a generic library support script that hides the complexity of using shared libraries behind a consistent, portable interface.

OTRS (Open Ticket Request System) is a ticket request and email management system to manage customer telephone calls and e-mails.

Clam AntiVirus is an anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways. It provides a multi-threaded daemon, a command line scanner, and an advanced tool for automatic database updating via Internet.

The glibc ports repository, an add-on for the GNU C Library (glibc). It contains code that is not maintained in the official glibc source tree.

Open Babel is a chemical toolbox designed to speak the many languages of chemical data. It's an open, collaborative project allowing anyone to search, convert, analyze, or store data from molecular modeling, chemistry, solid-state materials, biochemistry, or related areas.

PLplot is a cross-platform software package for creating scientific plots. There are many language bindings to the PLplot library (C, C++, Fortran, Java, Octave, Python, and many more).

Glade - a User Interface Designer for GTK+3 & Gnome.

GNU cflow analyzes a collection of C source files and prints a graph, charting control flow within the program.

Open MPI - A High Performance Message Passing Library. Open MPI is a project combining technologies and resources from several other projects (FT-MPI, LA-MPI, LAM/MPI, and PACX-MPI) in order to build the best MPI library available. Stable "bug fix" series.

Oracle Berkeley DB - high performance embeddable database engine (with AES encryption). Hint: The Oracle site may offer newer releases. Apache Derby is an relational database implemented entirely in Java based on the Java, JDBC, and SQL standards. Source distribution.

Glade - a User Interface Designer for GTK+2 & Gnome.

Oracle Berkeley DB - high performance embeddable database engine (with AES encryption). Hint: The Oracle site may offer newer releases. Apache Derby is an relational database implemented entirely in Java based on the Java, JDBC, and SQL standards. Binary distribution - contains the documentation, javadoc, and jar files.

Exim is a message transfer agent (MTA).

Exim is a message transfer agent (MTA). Documentation.

mdocml is a suite of tools compiling "-mdoc", the roff macro package of choice for BSD manual pages, and "-man", the predominant historical package for UNIX manuals. Hint: The installed binary name is "mandoc".

The GNU C Library ("system calls" and other basic facilities such as open, malloc, printf, exit...).

matplotlib is a python 2D plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments across platforms.

GNU Electric is a sophisticated electrical CAD system that can handle many forms of VLSI circuit design (written in Java; see also the Electric Home Page).

XForms is a graphical user interface toolkit for X based on the X11 Xlib library. Pre-release.

IRODS (the integrated Rule Oriented Data System) is a distributed data-management system for creating data grids, digital libraries, persistent archives, and real-time data systems.

FreeRADIUS Server Project - a high performance and highly configurable RADIUS server

XScreenSaver is a large collection of screen savers and also the framework for blanking and locking the screen.

Net-SNMP contains various tools relating to the Simple Network Management Protocol (successor of the cmu-snmp library).

LSOF - LiSt Open Files for running UNIX processes

ATK is a API (toolkit) for GNOME/GTK+ Accessibility.

Perl (Practical Extraction and Report Language) is a high-level, general-purpose, interpreted, dynamic programming language. Current stable release.

lrzip (Long Range ZIP or Lzma RZIP) is a compression program optimised for large files. It combines the best parts of various algorithms for large files and scales with increasing RAM size.

rsync is a fast incremental file-copying tool for bringing remote (and local) files into sync.

glance-2011.3.tar.gz OpenStack Image Service (Glance) provides discovery, registration, and delivery services for virtual disk images in a variety of formats.

OpenStack Compute (Nova) is the underlying cloud computing fabric controller for the OpenStack cloud (written in Python).

OpenStack Object Storage (Swift) is software for creating redundant, scalable object storage using clusters of commodity servers to store terabytes or even petabytes of accessible data (written in Python).

CDF (Common Data Format) is a self-describing data format for the storage and manipulation of scalar and multidimensional data in a platform- and discipline-independent fashion.

The Winelib User Guide (PDF format)

Rsyslog is an enhanced multi-threaded syslogd with a focus on security and reliability. Among others it offers support for TCP, SSL, TLS, RELP and writing to databases. Development version V6-series.

PCB is an interactive printed circuit board editor for the X11 window system. PCB can produce industry standard RS-274X and Excellon NC-Drill format output for submission to board manufacturers.

MariaDB is a database server that offers drop-in replacement functionality for MySQL. MariaDB 5.2 is based on MariaDB 5.1 and thus MySQL 5.1 but contains features that didn't have time to go into MariaDB 5.1.

Oracle Berkeley DB - high performance embeddable database engine (with AES encryption). Hint: The Oracle site may offer newer releases.

Cdrtools - Highly portable CD/DVD/BluRay command line recording software. Recent version.

QGIS (Quantum GIS) Alaska sample dataset including raster, imagery and vector data in several formats including a GRASS database.

Cyrus SASL (Simple Authentication and Security Layer) API implementation (see RFC 2222).

Samba is an re-implementation of the Microsoft CIFS/SMB protocols for UNIX systems (alpha version; with Active Directory support).

OpenCV (Open Source Computer Vision) is a library of programming functions for real time computer vision (for e.g. for human-computer interaction (HCI), object identification, face and gesture recognition, motion tracking, ...).

SCons is a software construction tool (a Python script and a set of modules as a superior alternative to the classic "Make" build tool).

GLPK (GNU Linear Programming Kit) is intended for solving large-scale linear programming (LP), mixed integer programming (MIP), and other related problems. linear programming problems by means of the revised simplex method.

Sylpheed is an X11 e-mail client (and news reader) based on GTK+.

The Unix port of OpenBSD's OpenSSH (Secure Shell).

OpenSSH Portable Release (Secure Shell).

Python is an interpreted, interactive, object-oriented programming language (3.x documentation, PDF A4).

Python is an interpreted, interactive, object-oriented programming language (3.x documentation, HTML).

Python is an interpreted, interactive, object-oriented programming language. It incorporates modules, exceptions, dynamic typing, very high level dynamic data types, and classes. Caution: 3.x is incompatible with 2.x.

MPICH2 is an all-new implementation of MPI (Message Passing Interface) that is intended to support research into the implementation of both MPI-1 and MPI-2.

diffutils - GNU diff, diff3, sdiff and cmp utilities

VTK (The Visualization ToolKit) documentation (man pages; HTML)

VTK (The Visualization ToolKit) data (examples and tests)

VTK (The Visualization ToolKit) is an software system for 3D computer graphics, image processing, and visualization. It consists of a C++ class library, and several interpreted interface layers including Tcl/Tk, Java, and Python.

poppler-data encoding data for the poppler PDF rendering library.

Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages, enabling Java and other programmers to be more productive. Documentation (API and code examples).

Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages, enabling Java and other programmers to be more productive. Source code.

Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages, enabling Java and other programmers to be more productive. For Unix, Mac OS X, Cygwin.

Advanced Bash Scripting Guide is an in-depth exploration of the art of shell scripting (HTML).

The Advanced Bash Scripting Guide is an in-depth exploration of the art of shell scripting (PDF format; roughly 950 pages!).

pstoedit translates PostScript and PDF graphics into other vector formats.

Sympa is an electronic mailing list manager

x3270 is an IBM 3270 terminal emulator for the X Window System (and Windows) running over a TELNET connection, emulating either an IBM 3279 (color) or 3278 (monochrome).

Samba is an re-implementation of the Microsoft SMB/CIFS protocols for Linux/Unix systems. It provides file and print services to SMB/CIFS clients and enables interoperability between Linux/Unix servers and Windows clients.

Fetchmail is a full-featured, remote-mail retrieval and forwarding utility. It supports POP2, POP3, RPOP, APOP, KPOP, all flavors of IMAP, ETRN, ODMR, and even IPv6 and IPSEC.

Open MPI - A High Performance Message Passing Library. Open MPI is a project combining technologies and resources from several other projects (FT-MPI, LA-MPI, LAM/MPI, and PACX-MPI) in order to build the best MPI library available. "Feature release" series.

OpenERP is a complete ERP (Enterprise Resource Planning) and CRM (Customer Relationship Management) software. Client componet.

OpenERP is a complete ERP (Enterprise Resource Planning) and CRM (Customer Relationship Management) software. Server component.

OpenERP is a complete ERP (Enterprise Resource Planning) and CRM (Customer Relationship Management) software. Internet client component.

Xpdf is a PDF viewer for X.

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. Maintenance release.

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. Documentation.

ntop is a network usage monitor (based on libpcap)

LZO is a portable lossless data compression library written in ANSI C.

Tcl v8.6 (HTML documentation). Development version.

Tcl v8.6 (tool command language). Development version.

Tk v8.6 (X11 toolkit implemented with the Tcl scripting language). Development version.

GNU libiconv is a character set conversion library (using Unicode).

CPAN query, download and build perl modules from CPAN (Comprehensive Perl Archive Network) sites.

ePiX, a collection of batch utilities that, creates mathematically accurate figures, plots, and movies using easy-to-learn syntax. The output is expressly suitable for use with LaTeX. Manual and sample files only.

ePiX, a collection of batch utilities that, creates mathematically accurate figures, plots, and movies using easy-to-learn syntax. The output is expressly suitable for use with LaTeX.

Bugzilla is an advanced "Defect Tracking System" or "Bug-Tracking System". Stable release. Bugzilla is an advanced "Defect Tracking System" or "Bug-Tracking System". Development release toward 4.2.

GnuPG - The GNU Privacy Guard (tool for secure communication and data storage). GNUPG-2 - the enhanced and somewhat harder to build version (compared to GnuPG-1).

Dante is a circuit-level firewall/proxy (socks server).

ncview is a X11 visual browser for netCDF data format files.

FFTW is a collection of fast C routines for computing the discrete Fourier transform (DFT) in one or more dimensions. It includes complex, real, symmetric, and parallel transforms, and can handle arbitrary array sizes efficiently

Nagios is an host/service/network monitoring system to identify and resolve IT infrastructure problems

The Common UNIX Printing System (CUPS) provides a portable printing layer for UNIX operating systems using Internet Printing Protocol (IETF-IPP) as basis for managing print jobs and queues. LPD and SMB and AppSocket protocols are supported with reduced functionality.

UW IMAP Toolkit Environment including sources for imapd server, pop2 and pop3 servers, and c-client library.

TeX Live provides a comprehensive TeX system including all the major TeX-related programs, macro packages, and fonts that are free software.

netperf+ is a network performance benchmark (TCP/UDP/DLPI/Sockets/SCTP).

Gcal displays month/year calendar sheets, eternal holiday and fixed date lists in many ways

Madagascar is a software package for multidimensional data analysis and reproducible computational experiments (mainly for researchers working with digital image and data processing in geophysics and related fields).

THE is a full-screen character mode text editor modelled on the VM/CMS editor XEDIT.

Inkscape is a Scalable Vector Graphics editor - a powerful drawing tool using the W3C standard Scalable Vector Graphics (SVG) file format.

Munin is a tool for graphing all sorts of information about one or more servers and displaying it in a web interface (requires Perl and RRDTool).

The Wine User Guide (HTML format)

The Wine User Guide (PDF format)

TeX Live is an easy way to get up and running with the TeX document production system. Network-based installer package.

GNU Aspell is a more intelligent Ispell (spell checker)

omniORN is a robust high performance CORBA ORB for C++ and Python (CORBA = Common Object Request Broker Architecture).

amavisd-new (A Mail Virus Scanner) is a high-performance interface between mailer (MTA) and content checkers: virus scanners, and/or SpamAssassin.

h4h5tools convert between NCSA's Hierarchical Data Format HDF (4.x) and HDF5.

GNU awk - pattern scanning and processing language

Libgcrypt is a general purpose library of cryptographic building blocks (originally based on GnuPG code).

Mtools is a collection of utilities to access MS-DOS disks from Unix without mounting them.

tgif is an Xlib based interactive 2-D drawing tool under X11 (and also a hyper-graphics editor/browser on the WWW).

DataFinder is a lightweight data management application for managing large sets of scientific and technical data (a variety of data storage interfaces are supported e.g. WebDAV, FTP, GridFTP, OpenAFS, or TSM).

SpamAssassin is a mail filter that uses a wide range of heuristic tests on mail headers and body text to identify "spam" (also known as unsolicited commercial email) incl. Bayesian (statistical) spam filter and several internet-based realtime blacklists.

Perl (Practical Extraction and Report Language) is a high-level, general-purpose, interpreted, dynamic programming language. Previous stable release.

NetCDF (network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.

FLTK (Fast Light Tool Kit) is a cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows, and MacOS X. Documentation (HTML).

FLTK (Fast Light Tool Kit) is a cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows, and MacOS X. Documentation (PDF).

FLTK (Fast Light Tool Kit) is a cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows, and MacOS X.

Python is an interpreted, interactive, object-oriented programming language. It incorporates modules, exceptions, dynamic typing, very high level dynamic data types, and classes.

Python is an interpreted, interactive, object-oriented programming language (2.x documentation, PDF A4).

Python is an interpreted, interactive, object-oriented programming language (2.x documentation, HTML).

Scilab is a matrix-based scientific software package resembling Matlab and Xmath. Scilab contains hundreds of built-in mathematical functions, sophisticated data structures (including polynomials, rationals, linear systems, lists, etc...), a high-level interpretor and a macro language, and excellent graphics.

less is a file pager (a program that displays text files similar to "more" or "pg")

Fityk is a general-purpose nonlinear curve-fitting and data analysis program. It allows data visualization, separation of overlapping peaks, background subtraction, data calibration and much more.

Celestia is a real-time space simulation that lets you experience our universe in three dimensions (OpenGL-based).

Amanda is a backup system designed to archive many computers on a network to a single large-capacity tape drive.

Qpopper is a POP3 server (enhanced Berkeley Post Office Protocol Server including TLS/SSL)

NZMATH is a Python based number theory oriented calculation system.

UDAV (universal data array visualization) is a cross-platform program for data arrays visualization based on the MathGL library.

MathGL is a library for scientific graphics that can export graphics to raster and vector formats.

Bonita Open Solution - Business Process Management and Workflow Software (QuickStart Guide)

Elm ME+ is an interactive screen-oriented mail system, Millennium Edition.

Calc is a C-style arbitrary precision calculator.

Rexx/SQL provides Rexx programmers with a consistent, simple, yet powerful interface to SQL databases.

XZ Utils is free general-purpose data compression software with high compression ratio (successor to LZMA Utils).

DeleGate - a multi-purpose application level gateway, or a proxy server. DeleGate mediates communication of various protocols (HTTP, FTP, NNTP, SMTP, POP, IMAP, LDAP, Telnet, SOCKS, DNS, etc.), applying cache and conversion for mediated data, controlling access from clients and routing toward servers (stable version)

Clzip is a lossless file compressor based on the LZMA algorithm. It decompresses almost as fast as gzip and compresses better than bzip2, but requires more memory and time during compression (a C language version of lzip, intended for embedded devices or systems lacking a C++ compiler).

Sendmail is a general purpose email routing facility that supports many kinds of mail-transfer and mail-delivery methods

Bison is a general-purpose parser generator.

GNU GRUB 2 - a multiboot boot loader (development version)

The ATLAS (Automatically Tuned Linear Algebra Software) project is an ongoing research effort focusing on applying empirical techniques in order to provide portable performance.

NAS - The Network Audio System.

GNU Find Utilities are basic directory searching utilities: find, locate, uodatedb and xargs Development version.

Nano is ANOther display-oriented text editor (an enhanced free clone of Pico from the Pine project). Development version.

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (documentation of current stable release)

Graphviz - a set of graph drawing tools and libraries

GSL (GNU Scientific Library) is a numerical library for C and C++ programmers.

GSL (GNU Scientific Library) is a numerical library for C and C++ programmers. Reference manual (PDF).

Lzip is a lossless file compressor based on the LZMA algorithm. It decompresses almost as fast as gzip and compresses better than bzip2, but requires more memory and time during compression.

IMAL (Image Analysis and Measurement Lab) is a scientific image analysis program that allows you to create, edit, analyze, and produce color prints of images (formerly tnimage). Documentation (PDF).

Gutenprint (Gimp-Print) is a collection of very high quality printer drivers for UNIX/Linux (plugins for GIMP2, driver for CUPS and GhostScript)

GNU SASL is an implementation of the Simple Authentication and Security Layer (SASL).

GtkExtra is a widget set complementary to GTK+ for creating GUI's for the X Window System (scientific graphics, ...). Developer release.

GNU shar utilities (shar, uuencode, remsync) prepare data for sending via e-mail.

XEmacs (an alternative to GNU Emacs) is a highly customizable open source text editor and application development system (beta version).

NCO (netCDF Operators) are a suite of programs known as operators. The operators facilitate manipulation and analysis of self-describing data stored in the netCDF or HDF formats.

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Previous release series.

txt2pdf is a converter from text files to PDF format files (requires perl5; shareware).

Unison is a file-synchronization tool for Unix and Windows.

ParaView - is a scientific data analysis and visualization application for large data sets. Some data.

GOsa provides a framework for managing accounts and systems in LDAP databases. Old stable release.

GRASS (Geographic Resources Analysis Support System) is a raster- and vector-based GIS, image processing system, graphics production system and spatial modeling system.

GGobi is an visualization program for exploring high-dimensional data.

S-Lang is a multi-platform programmer's library supporting display/screen management, keyboard input, keymaps, and so on.

Wine is an Open Source implementation of the MS Windows API on top of X, OpenGL, and Unix. Think of Wine as a compatibility layer for running Windows programs.

The ncurses (new curses) library is a freeware emulation of System V Release 4.0 curses.

wxWidgets is a C++ cross-platform GUI toolkit (for Windows, OS X, Linux and UNIX as well as several mobile platforms).

RapidMiner (formerly YALE) is a knowledge discovery and data mining system. Manual (English, PDF).

RapidMiner (formerly YALE) is a knowledge discovery and data mining system. Manual (German, PDF).

p7zip is a command-line file archiver with a high compression ratio (a port of the Windows program 7za.exe).

heimdal-1.4.1rc2.tar.gz Heimdal is a free implementation of Kerberos 5 (a system for authenticating users and services on a network). Stable release. Heimdal is a free implementation of Kerberos 5 (a system for authenticating users and services on a network). Release candidate.

strace is a diagnositic, instructional and debugging tool that traces and decodes system calls on Linux, SunOS 4, SysVr4, SunOS 4, Solaris2, and Irix5 platforms.

GNU Tar archiving utility.

DejaGnu is a framework for testing other programs.

XBMC is a software media player and entertainment hub for digital media that plays almost all popular audio and video formats around.

libsigc++ implements a typesafe callback system for standard C++ (used by gtkmm to wrap the GTK+ signal system).

Mailman - The GNU Mailing List Management System (requires Python 2.4 or later)

GNU M4 is an implementation of the traditional Unix macro processor.

MariaDB is a database server that offers drop-in replacement functionality for MySQL 5.1, but with performance like MySQL 5.5 (thanks to XtraDB), and more features.

LPRng is an enhanced, extended, and portable implementation of the Berkeley LPR print spooler functionality (LPRng SourceForge Project).

Xplanet displays rendered image of the earth or another planet (user supplied maps; requires the imlib library)

BASH - GNUs Bourne Again Shell

GNU Readline library - get a line from a user with editing.

FOX is a C++ based Toolkit for developing Graphical User Interfaces

FIGlet is a program that creates large characters out of ordinary screen characters.

... a collection of almost obsolete or out-dated software archives

cairo is a 2D vector graphics library with support for multiple output devices (X11, Windows-API Win32, image buffers and other experimental backends like PostScript and PDF). Development version.

MPlayer is a Unix movie player that can play most standard video formats out of the box and almost all others with the help of external codecs.

LibNcFTP: is a FTP client library to build custom applications that use the File Transfer Protocol (FTP).

OpenOffice is an office software suite for word processing, spreadsheets, presentations, graphics, databases and more.

NcFTP is a set of application (client) programs implementing the File Transfer Protocol (FTP).

dictd is a client/server software implementing the Dictionary Server Protocol (DICT)

xdelta is a tool and library for differential compression (supports VCDIFF encoding and decoding).

GNU Aspell is a more intelligent Ispell (spell checker)

The OpenJPEG library is an open-source JPEG 2000 codec written in C language.

cproto generates C function prototypes from C source code.

groff (GNU Troff) is a software typesetting package which reads plain text mixed with formatting commands and produces formatted output.

cairo is a 2D vector graphics library with support for multiple output devices (X11, Windows-API Win32, image buffers and other experimental backends like PostScript and PDF).

Perltidy is a Perl script indenter and reformatter (beautifier).

Scilab is a matrix-based scientific software package resembling Matlab and Xmath. English help file in PDF format.

ooRexx (Open Object Rexx) is a free implementation of Object Rexx. Object Rexx is an enhancement of the classic Rexx interpreter; a full-featured programming language with a human-oriented syntax.

LPRng is an enhanced, extended, and portable implementation of the Berkeley LPR print spooler functionality (LPRng "Patrick Powell").

Nano is ANOther display-oriented text editor (an enhanced free clone of Pico from the Pine project)

Ganymede is a Java-based portable and customizable network directory management system (a kind of metadirectory system supporting NIS, DNS, Netinfo, LDAP ...).

Scilab is a matrix-based scientific software package resembling Matlab and Xmath. Introduction (PDF format).

GIMP User Manual (german language; HTML format)

GIMP User Manual (english language; HTML format)

GIMP User Manual (written for the GIMP Help Browser, but can produce help pages for other formats as well).

GNU miscellaneous files distribution

Yodl - Extensible document language

Expect performs programmed dialogue with other interactive programs for automating interactive applications.

sK1 is an illustration program that supports professional publishing features, such as CMYK color, separations, ICC color management and press-ready PDF output. Pre-release.

The The Edinburgh Speech Tools Library (used by the Festival Speech Synthesis System).

The Festival Speech Synthesis System.

The Wine Developers Guide (HTML format)

The Wine Developers Guide (PDF format)

Common C++ 2 is a C++ framework offering portable support for threading, sockets, file access, daemons, persistence, serial I/O, XML parsing, and system services. Hint: The newer GNU uCommon C++ will effectively replace this original GNU Common C++ codebase over time.

email is a command line SMTP client supporting attachments, SMTP authentication, encryption, personalized signatures, ...

RPM is a powerful and mature command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating Unix software packages ("no longer Linux-centric"). Hint: The RPM-page may offer newer releases (but in rpm format).

OpenDS (Open Directory Server) is a free and comprehensive next generation directory service, based on LDAP and DSML standards (Java sources).

OpenDS (Open Directory Server) is a free and comprehensive next generation directory service, based on LDAP and DSML standards (Java).

Re-alpine is a fork of Alpine (the "pine" successor) - basically a screen-oriented message-handling tool.

GNU Autoconf is an extensible package of M4 macros that produce shell scripts to automatically configure software source code packages.

Lout is a document formatting system (producing plain text, PostScript or PDF).

Lout is a document formatting system (producing plain text, PostScript or PDF).

bzip2 is a patent free block-sorting data compressor.

HylaFAX is a system for sending and receiving facsimiles as well as for sending alpha-numeric pages (fax server).

mutt is a small but powerful text-based mail client. Development version.

Heimdal is a free implementation of Kerberos 5 (a system for authenticating users and services on a network). Stable release.

The GNU Mailutils is a protocol-independent mail framework containing a POP3 server, an IMAP4 server, a Sieve mail filter, a POSIX `mailx' client, and a collection of other tools.

Extrema is visualization and data analysis tool for researchers

Vim - Vi IMproved (vi clone) advanced text editor (with optional GUI). Documentation (HTML).

Vim - Vi IMproved (vi clone) advanced text editor (with optional GUI).

VILE is a text editor which optionally retains the "finger-feel" of "vi" while adding the multiple buffer and multiple window features of emacs and other editors.

QDBM is a library of routines for managing a database (an alternative for DBM or its followers NDBM and GDBM).

GNU make utility is a tool which controls the generation of executables and other non-source files of a program from the program's source files.

Plugins for the Nagios host/service/network monitoring program

The Xemacs Sumo Tarball - a big collection of XEmacs lisp packages (roughly 35 MB!)

The Xemacs Sumo Tarball - a big collection of XEmacs lisp packages for Mule (MULtilingual Enhancement to GNU Emacs).

transfig is a set of tools for creating TeX documents with graphics which are portable (lets xfig export to other formats ie PostScript).

Wine's documentation repository. It consists of various guides and their translations.

Bogofilter is a learning spam mail filter using Bayesian (statistical) analysis for classification.

OpenLDAP is a suite of the Lightweight Directory Access Protocol (v3) servers, clients, utilities, and development tools. Stable Release.

The Winelib User Guide (HTML format)

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics (demos). Current release.

GNU ID Utils is a binary file containing a list of file names, a list of tokens, and a sparse matrix indicating which tokens appear in which files (for e.g. to make many text-searching tasks simpler and faster).

Leafnode is a store & forward NNTP proxy for small (dialup) sites.

Code::Blocks is an cross platform C++ IDE.

GNU gettext utilities - a set of tools that provides a framework to help other GNU packages produce multi-lingual messages (national language support).

mgetty sends and receives faxes using a class 2.0 or 2 faxmodem (with voice call handling). Beta version.

ViewVC is a browser interface for CVS and Subversion version control repositories.

Cdrtools - Highly portable CD/DVD/BluRay command line recording software.

GNU enscript - convert text files to PostScript, HTML, RTF, ANSI, and overstrikes

XChat is an IRC chat program (for both Linux and Windows).

XForms is a graphical user interface toolkit for X based on the X11 Xlib library.

XForms graphical user interface toolkit for X Window Systems (documentation, HTML).

RPM is a powerful and mature command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating Unix software packages ("no longer Linux-centric"). Hint: The RPM-page may offer newer releases (but in rpm format).

Babel is an IDL-based interoperability tool specific to engineering and scientific applications. Users guide (PDF format; roughly 300 pages).

PDFlib Lite is a portable C library for dynamically generating PDF files (the lite version represents a subset of the full ePDFlib product).

SARA (Security Auditor's Research Assistant) - a network security analysis tool (last and final release).

DeleGate - a multi-purpose application level gateway, or a proxy server. DeleGate mediates communication of various protocols (HTTP, FTP, NNTP, SMTP, POP, IMAP, LDAP, Telnet, SOCKS, DNS, etc.), applying cache and conversion for mediated data, controlling access from clients and routing toward servers (stable version)

Coda - a distributed file system like NFS and AFS

INN (InterNetNews) is a complete Usenet system. It includes innd, an NNTP server, and nnrpd, a newsreading server.

GtkExtra is a widget set complementary to GTK+ for creating GUI's for the X Window System (scientific graphics, ...).

OpenMotif is the publicly licensed version of Motif, the industry standard graphical user interface toolkit for UNIX systems (bug fix release).

GNU cpio copies files into or out of a cpio or tar archive.

Aegis is a transaction-based software configuration management system.

LaTeX2rtf is a LaTeX to RTF converter.

xmail is an internet and intranet mail server featuring an ESMTP server, POP3 server, finger server, TLS support for SMTP and POP3 (both server and client side), SMTP authentication and many other features

Petidomo is a small and efficient mailing list manager

AUCTEX is an extensible package for writing and formatting TeX files in GNU Emacs and XEmacs.

GNU Units converts quantities expressed in various scales to their equivalents in other scales.

pilot-link is a suite of tools used to connect your Palm handheld with Unix, Linux, and any other POSIX-compatible machines.

XRN a X News reader (using NNTP)

GNU Indent changes the appearance of a C program by inserting or deleting whitespace.

GNU Gzip is a data compression program

GNU patch takes a patch file (generated by the diff program) and produces according patched versions of the affected files.

JED is a text editor (syntax highlighting, extensible in the C-like S-Lang scripting language).

BEYE (Binary EYE) is a portable, advanced viewer of binary files with built-in editor for binary, hexadecimal and disassembler modes. (project name was changed from BIEW into BEYE)

star - a fast tar archiver with many improvements to other tar implementations (including gnu tar)

OpenNTPD is a free, easy to use implementation of the Network Time Protocol (NTP) - OpenBSD OpenNTPD.

pstree shows the ps listing (running processes) as a tree.

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (note: HDF5 and old HDF versions are NOT compatible; old stable release)

The Hoard memory allocator is a drop-in replacement for malloc() that can improve application performance, especially for multithreaded programs running on multiprocessors (hint: newer releases now part of the HeapLayers package).

PSPP is a program for statistical analysis of sampled data.

GNU plotutils produce 2D plots in a variety of formats, built around an enhanced libplot C/C++ function library.

Pike is an interpreted, high-level, cross-platform, dynamic programming language (syntax similar to Java and C)

TRE is a POSIX compliant regexp matching library that supports for e.g. approximate (fuzzy) matching (includes a version of the "agrep" tool).

GANTT project - Gantt chart based project scheduling and management tool.

GANTT project - Gantt chart based project scheduling and management tool.

Ygl emulates SGI's GL routines under X11.

dxpc is an X protocol compressor designed to improve the speed of X11 applications run over low-bandwidth links.

Grepmail - search for emails in a normal or compressed mailbox using a regular expression or date constraint (Perl)

XaoS is a fast portable real-time interactive fractal zoomer.

Framewave is a collection of popular image and signal processing routines designed to accelerate application development, debugging, and optimization on x86-class processor platforms (derived from the AMD Performance Library; source code).

bcpp is a C(++) source code beautifier.

GNU sed is a stream editor/filter.

Xlogmaster is a tool to monitor logfiles & hardware status (uses GTK+).

h5utils is a set of utilities for visualization and conversion of scientific data in the free, portable HDF5 format.

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data: tutorial

GNU Find Utilities are basic directory searching utilities: find, locate, uodatedb and xargs

Xfig is an interactive drawing tool (X11).

LessTif is a OSF/Motif Clone. It is a set of widgets for developing graphical user interfaces.

sK1 is an illustration program that supports professional publishing features, such as CMYK color, separations, ICC color management and press-ready PDF output (a fork of Sketch 0.6.15).

Cscope is a text screen based source browsing tool (C, C++).

UnZip is Info-ZIP group's portable UnZip zipfile-extraction program (compatible with PKZIP archives).

FElt is a finite element analysis system.

Logdaemon - logging and access control in tcp wrapper style for rlogind, rshd, login, rexecd, ftpd, telnetd,/nbsp;...

IFHP is a universal print filter for PostScript and HP printers, as well as the usual 'dumb' printers (for BSD based print spoolers, for e.g. used by LPRng).

TightVNC is an enhanced version of VNC (Virtual Network Computing), allowing remote network access to graphical desktops.

gnuit - GNU Interactive Tools (file system browser, process viewer/killer, hex/ascii file viewer).

GNU DDD (Data Display Debugger) is a common graphical front-end for command-line debuggers such as GDB, DBX, WDB, Ladebug, JDB, XDB, the Perl debugger, or the Python debugger.

PVM (Parallel Virtual Machine), a software system that enables a collection of heterogeneous computers to be used as a coherent and flexible concurrent computational resource.

A file distributing tool (newer Windows only versions may run under Wine).

Babel is a language interoperability tool intended for use by the high-performance scientific computing community that supports the Scientific Interface Definition Language (SIDL) for the language-independent declaration of interfaces associated with scientific software packages.

TinyCDB is a very fast and simple package for creating and reading constant databases (optimized exclusively for read access).

XEmacs (an alternative to GNU Emacs) is a highly customizable open source text editor and application development system (current version).

MAVERIK Virtual Reality demos

MAVERIK is a system for managing graphics and interaction in Virtual Reality applications. It is designed to address the challenges of highly interactive virtual environments containing many objects with complex geometry (using either Mesa or OpenGL to perform rendering).

GNU Radius is a suite of programs for performing remote user authentication and accounting services (using RADIUS protocol).

joe (Joe's Own Editor) with a GNU-Emacs imitation (key-sequences are reminiscent of WordStar and Turbo-C)

RealVNC (Virtual Network Computing) Free Edition for Unix/Linux - cross-platform remote control between Windows and Unix/Linux computers (full source code to both Viwer and Server)

iRealVNC (Virtual Network Computing) Free Edition for Linux (x86) - cross-platform remote control between Windows and Unix/Linux (installable packages including Viewer, XFree86 module, stand-alone Server and x0vncserver).

OpenProj is an open source project management solution intended as a complete desktop replacement to commercial software like for e.g. Microsoft Project (Java sources).

OpenProj is an open source project management solution intended as a complete desktop replacement to commercial software like for e.g. Microsoft Project (Java binaries).

slrn is an NNTP based news reader (using the S-Lang library).

Zip is a compression and file packaging utility. It is compatible with PKZIP 2.04g (Phil Katz ZIP) for MSDOS systems.

Texinfo is GNU's hypertext documentation language/system.

Tiger is a Unix security audit and intrusion detection tool.

V.E.R.A Virtual Entity of Relevant Acronyms (shareware?)

PDCurses is a multiple platforms curses library implementing most of the functions available in X/Open and System V R4 curses.

MICO is a fully standards-compliant implementation of the CORBA standard (Common Object Request Broker Architecture) that enables software components written in multiple computer languages and running on multiple computers to work together.

JBIG-KIT implements a highly effective data compression algorithm for bi-level high-resolution images.

Alpine is a fast, easy to use, highly customizable screen-oriented email client (the "pine" successor).

X-CD-Roast is a graphical user interface (GUI) for the command-line cdrtools.

Heirloom mailx is a mail user agent (derived from Berkeley Mail) with MIME extensions (info: formerly known as "nail")

shtool is a compilation of small but very stable and portable shell scripts into a single shell tool.

Swatch (Simple WATCHdog) activly monitors log files produced by UNIX's syslog facility.

NetCDF (network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.

Icecast is an internet streaming audio system.

GRACE - GRaphing, Advanced Computation and Exploration of data (a WYSIWYG 2D plotting tool, a descendant of and replacement for ACE/gr respectively xmgr)

SNIPS (Systems & Network Integrated Polling Software) is a rewrite of the NOCOL network monitoring package (now with RRDtool integration)

CVS (Concurrent Versions System) is a version control system designed for software projects.

Top reports system statei including a list of the top cpu using processes. Beta version.

Xcoral is a multiwindow mouse-based text editor (X11) with a built-in browser for C functions and C++ classes, methods, files etc...

Æmail - Personal Archival Email (requires PostgreSQL).

Gnus is a flexible message reader running under GNU Emacs. It supports reading and composing both news and mail.

xdvi displays TeX .dvi files (X11).

Tix, the Tk Interface eXtension, is a powerful set of user interface components that expands the capabilities of your Tcl/Tk and Python applications.

Aegis is a transaction-based software configuration management system. Reference manual (PDF).

FreeRADIUS Clien is a framework and library for writing RADIUS clients.

Aegis is a transaction-based software configuration management system. User guide (PDF).

GNU Bayonne 2 is a second generation telephony application server with a special focus on SIP. Release candidate.

Top reports system statei including a list of the top cpu using processes.

Tcl Blend is a Tcl package that provides access to Java classes from Tcl (implemented using JNI).

Jacl (Java Command Language) is a 100% Java implementation of Tcl 8.x. Binary distribution.

Jacl (Java Command Language) is a 100% Java implementation of Tcl 8.x. Source distribution.

flex: The Fast Lexical Analyzer

Q is an extensible functional programming language based on the term rewriting calculus. Q may be useful for scientific programming, and also as a sophisticated kind of desktop calculator.

xautolock launches a given program after period of X session inactivity (screen-locker).

GNU a2ps is an ASCII to PostScript converter with pretty-printing capabilities.

PRepS is a problem reporting and tracking system (requires GTK and PostgreSQL).

The PRepSTools for PRepS (a problem reporting system).

super is a setuid-root program that offers restricted setuid-root access to executables, adjustable on a per-program and per-user basis (like sudo) and a relatively secure environment for scripts.

Diablo is a comprehensive (Usenet) newsfeeding and newsreading software package.

GNU MARST is an Algol-to-C Translator.

diction prints wordy and commonly misused phrases, analyses surface characteristics of a document.

CrossVC is a graphical Interface for the cvs client commandline tool on the Unix, Windows and Mac OS X platform (old name: LinCVS). Hint: You may look for newer versions 2.x that have another license and are no longer freely distributable.

PIKT (Problem Informant/Killer Tool) is a cross-categorical, multi-purpose software for monitoring and configuring computer systems, administering networks, and organizing system security.

most is a powerful textfile paging program (supports multiple windows and can scroll left and right).

LSH - a GNU implementation of the Secure Shell protocols (ssh).

Geomview is an interactive 3D geometry viewing program.

GNU libavl is a library in ANSI/ISO C for manipulation of binary trees and balanced binary trees (to find a particular item in an ordered data set)

OpenMotif is the publicly licensed version of Motif, the industry standard graphical user interface toolkit for UNIX systems (stable version).

Splint is a tool for statically checking C programs for security vulnerabilities and coding mistakes (successor to LCLint).

libmng is the reference library for MNG, the animation extension to the popular PNG format.

iSelect is a (n)curses-based tool for interactive line selection in an ASCII file via a full-screen terminal session.

plan is a calendar and day planner (requires X/Motif)

jwhois is an improved Internet Whois client.

GNU General Public License - Version 3, 29 June 2007 (plain text format)

GNU Lesser General Public License - Version 3, 29 June 2007 (formerly known as Library GPL; plain text format)

ZMailer is a SMTP Mail Transfer Agent (MTA) (intended for gateways or mail servers that have extreme demands on the abilities of the mailer).

GNU General Public License - Version 2, June 1991 (plain text format)

mutt is a small but powerful text-based mail client. Stable version.

Dmalloc is a debug memory allocation library.

portmap is a DARPA port to RPC program number mapper.

GRACE - GRaphing, Advanced Computation and Exploration of data (a WYSIWYG 2D plotting tool, a descendant of and replacement for ACE/gr respectively xmgr) - development version

echoping tests a remote host with TCP "echo" (or other protocol) packets.

Stanford SRP - The Secure Remote Password protocol performs secure remote authentication of short human-memorizable passwords and resists both passive and active network attacks.

arpwatch_NG monitors Ethernet or FDDI network traffic and builds databases of Ethernet/IP address pairs (next generation version).

Visual Tcl ia an application development environment for UNIX, Windows and Macintosh platforms (Tcl/Tk).

The OPeNDAP Data Connector (ODC) allows to search for and retrieve datasets published by OPeNDAP data servers (for e.g. climatic data, satellite imagery, and ocean sensor results).

A complete and powerful command-line based DNS query and testing tool. A nameserver query utility a la 'nslookup' and 'dig' but with more extensive testing and test automation features.

LibGII (General Input Interface) - API for all possible input sources (see also LibGGI).

LibGGI (General Graphics Interface) library - a flexible drawing library (see also LibGII).

GNU Bayonne 2 is a second generation telephony application server with a special focus on SIP.

PPR is a printer spooler specially designed for spooling jobs to PostScript printers (or to non-PostScript printers using Ghostscript).

ngrep (network grep) applies GNU grep's common features to the network layer.

SpecTcl is a graphical user interface (GUI) builder that helps you construct cross platform applications written in Tcl (version 1.2.2a).

moodss is a modular monitoring application, composed of a GUI and a daemon (Tcl/Tk).

GNU screen is a screen manager with VT100/ANSI terminal emulation (multiplexing up to 10 pseudo-terminals).

GNU General Public License - Version 1, February 1991 (plain text format)

GNU greg is a framework for testing other programs and libraries (requires guile).

xmorph is an image warping and dissolving (morphing) program.

bc is an arbitrary precision numeric processing language. Development version.

OpenDX is an application and development software package for visualizing data, especially 3D data from simulations or acquired from observations (based on IBM's Visualization Data Explorer).

Xdialog converts any terminal based program into a program with an X-windows interface (help button+box, treeview, editbox, file selector, range box, and much more; uses Gtk).

xplot is a fast tool to graph and visualize lots of data (for e.g. from TCP Packet Trace Analysis).

MM - Shared Memory Library

Mahogany is a cross-platform mail and news client - supports POP3, IMAP and full MIME support (using wxWindows building on the gtk toolkit on Unix).

arpwarch is a ethernet monitor program for keeping track of ethernet/ip address pairings,

IrDA Utils are a collection of programs, that enables the use of the IrDA protocols (to communicate with remote devices usinge infrared wireless communication).

GNU Portable Threads is a very portable POSIX/ANSI-C based library for Unix platforms which provides non-preemptive priority-based scheduling for multiple threads of execution (aka "multithreading") inside event-driven applications.

V.E.R.A Virtual Entity of Relevant Acronyms (free GNU version)

Xbae is a Matrix Motif widget set (allows a semi-spreadsheet view of data).

GNU Bayonne 1 is a script driven threaded state-event multi-line telephony server for creating voice response applications, such as automated attendant, call distribution, announcements and voice messaging.

Layers provides a flexible infrastructure for composing high-performance memory allocators out of C++ "layers" (incorporating Hoard).

OpenNTPD is a free, easy to use implementation of the Network Time Protocol (NTP) - port of OpenBSD's OpenNTPD.

am-utils automatically mounts file systems (test release; Sun-style automount syntax).

am-utils automatically mounts file systems.

npadmin examines network printer information (using SNMP).

gpc is the GNU Pascal Compiler (32/64 bit).

scanlogd is a TCP port scan detection tool.

Zsh is a powerful UNIX command interpreter (shell). Reference card (a little bit out-dated).

OpenMotif is the publicly licensed version of Motif, the industry standard graphical user interface toolkit for UNIX systems. Manual (PDF).

THE is a full-screen character mode text editor modelled on the VM/CMS editor XEDIT.

OpenDX - Open Data Explorer based on IBM's scientific data visualization software. Samples.

XKeyCaps - graphically display and edit the X11 keyboard mapping ("xmodmap" front-end).

OpenSP is a variant of James Clark's SP SGML parser, maintained by the OpenJade team ("An SGML System Conforming to International Standard ISO 8879 -- Standard Generalized Markup Language")

TclX is a set of extensions to Tcl 8.x (the Tool Command Language) and Tk 8.x.

Ghostscript - PostScript and PDF interpreter.

pnmtopng converts a portable anymap into a Portable Network Graphics file (and vice versa).

Antiword is a free MS-Word reader - converts the documents from Word 6, 7, 97 and 2000 to ASCII and Postscript (beta release).

Euler is a program for quickly and interactively computing with real and complex numbers and matrices supporting 2D and 3D plots (requires GTK+). Hint: The most recent version of Euler runs only in Windows (or under Linux in Wine).

xinetd is a secure replacement for inetd, the internet services daemon.

Sysmon is a network monitor (HTTP, IMAP, SMTP, IMAP, POP3, PING, TCP, UDP, and NNTP based checks).

CVS (Concurrent Versions System) is a version control system designed for software projects. Feature release.

ELM is an interactive screen-oriented mail system.

GCL (GNU Common Lisp) is a compiler and interpreter for Common Lisp.

Skencil is a vector drawing program (old name: sketch; requires python).

ispell is a screen-oriented interactive spell-checking program. An interactive spell-checking program

RealVNC (Virtual Network Computing) Java Viewer Source Distribution

chroot_safe is a tool to chroot any dynamically linked application in a safe and sane manner.

GNATS (GNU Problem Report Management System) is a set of tools for tracking bugs reported by users to a central site.

ftnchek is a Fortran 77 program checker. Documentation (PDF).

ftnchek is a Fortran 77 program checker (detecting unused, uninitialized, and undeclared variables).

emacs-leim is Emacs Lisp code for input methods for various international character scripts.

A simple program to extract, test and view RAR archives created with the ARJ archiver

Exmh is a Tcl/Tk based graphical user interface to the MH mail system.

Oberon is a programming language in the Pascal-Modula tradition and a modern operating system for single-user personal workstations.

sgrep is a tool to search a file for structured pattern.

GNU Aspell is a more intelligent Ispell (spell checker)

Programming in Emacs Lisp: An Introduction (texinfo)

NEdit is a multi-purpose text editor (X11 Motif)

POV-Ray (Persistence of Vision Raytracer) is a ray trace renderer to create three-dimensional, photo-realistic images (source code, documentation and scene files).

Cricket monitors and visualizes (network) trends in time-series data (using "rrdtool").

UUDeview is a smart decoder for attachments received in encoded form via e-mail or news.

xtem_TeXMenu provides for a simple and comfortable graphical user interface (GUI) to control many TeX/LaTeX facilities

Extract ASCII text from a PostScript or PDF file

The Jargon File, a comprehensive compendium of hacker slang illuminating many aspects of hackish tradition, folklore and humor.

ispell is a screen-oriented interactive spell-checking program (an unofficial release which adds support for the -e5 option and has some fixes).

Visual Tcl ia an application development environment for UNIX, Windows and Macintosh platforms (Tcl/Tk).

mpack/munpack - utilities for encoding and decoding binary files in MIME (Multipurpose Internet Mail Extensions) format mail messages

International X11 fonts (BDF format) for all characters that Emacs 20 can handle

hp2xx converts vector-oriented HP-GL data into a variety of popular graphics formats.

memwatch is an ANSI C fault tolerant memory leak and corruption detection tool.

xps - process tree display and manipulation (X11).

OpenJade is an implementation of DSSSL (Document Style Semantics and Specification Language), an ISO standard for rendering SGML and XML documents (based on James Clark's Jade).

RXVT (ouR eXtended Virtual Terminal) is an 8-bit clean, colour less memory using xterm replacement

Zsh is a powerful UNIX command interpreter (shell). User's guide (PDF, A4 format, 335 pages).

OpenJade is an implementation of DSSSL (Document Style Semantics and Specification Language), an ISO standard for rendering SGML and XML documents (based on James Clark's Jade).

THE is a full-screen character mode text editor modelled on the VM/CMS editor XEDIT. Documentation in PDF format, DIN A4.

mp - pretty printing of ASCII files on PostScript printers ("Sun"-like).

tiff2png converts a Tagged Image File Format (TIFF) file into a Portable Network Graphics (PNG) file.

ups is a source level C and C++ debugger (X11), Fortran is also supported on some systems.

Unicode-Map converts strings from and to 2-byte Unicode UCS2 format (Perl module, needs Startup-x.xxx.tar.gz).

Par is a flexible filter for reformatting paragraphs of text.

procmail - powerful mail processing. It can sort incoming mail into separate folders/files, preprocess mail, start any programs upon mail arrival or selectively forward certain incoming mail automatically to someone, can create mailing lists.

daemontools is a collection of tools for managing UNIX services.

Trueprint prints C (but also C++, Java, Perl, shell, ...) program listings on postscript printers.

PreScript converts PostScript to plain ASCII or HTML (requires Ghostscript and Python).

The PGPLOT Graphics Subroutine Library is a Fortran- or C-callable, device-independent graphics package for making publication quality scientific graphs.

Recode converts files between character sets and usages.