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

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

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

DBI - The Perl Database Interface (requires one or more 'driver' modules DBD::\* to talk to databases).

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

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

RT (Request Tracker) is a trouble ticketing system.

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.

Various Domain Name Service (DNS) utilities

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.

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

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

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.

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.

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

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.

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

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.

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

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

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)

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

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

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

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.

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.

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.

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

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the 4.6 release series.

Mailman - The GNU Mailing List Management System. 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).

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.

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the 4.5 release series.

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. Maintenance release.

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.

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

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

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

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").

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

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.

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.

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.

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.

MySQL Cluster provides shared-nothing clustering capabilities for the MySQL database management system. It is designed to provide high availability and high performance, while allowing for nearly linear scalability.

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

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.