7-Zip is a free file archiver with the supported formats 7z, ZIP, GZIP, BZIP2 and TAR and (unpacking only) ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.

7-Zip is a free file archiver with the supported formats 7z, ZIP, GZIP, BZIP2 and TAR and (unpacking only) ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z. Windows Installer.

7-Zip is a file archiver with the supported formats 7z, ZIP, GZIP, BZIP2 and TAR and (unpacking only) ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z. Source code.

7-Zip is a free file archiver with the supported formats 7z, ZIP, GZIP, BZIP2 and TAR and (unpacking only) ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z. Windows Installer for 64-bit Windows.

AbiWord is a free word processing program. It is suitable for typing papers, letters, reports, memos, and so forth.

Artistic Style is a source code indenter, formatter, and beautifier for the C, C++, C# and Java programming languages.

Bazaar is a decentralized version control system that helps you track project history over time and to collaborate easily with others (GNU project, written in Python). Windows Standalone Installer.

CCleaner is a Windows system optimization and cleaning tool. Hint: Besides this "Free" version there are also a "Home" and a "Business" version available.

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. This self-installation file contains everything CDF offers, except for the CDF Perl APIs. For Windows NT/2000/XP/Vista (32-bit systems).

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. This self-installation file contains everything CDF offers, except for the CDF Perl APIs. For Windows NT/2000/XP/Vista (only 64-bit systems).

Celestia is an OpenGL-based 3D space simulation that lets you travel through the solar system, to the stars, and even beyond the galaxy.

CFITSIO is a library of C and Fortran subroutines for reading and writing data files in the FITS (Flexible Image Transport System) data format (source code).

CFITSIO is a library of C and Fortran subroutines for reading and writing data files in the FITS (Flexible Image Transport System) data format (precompiled binary DLL shared libraries for For Visual C++).

Chandler is a Note-to-Self Organizer. It features calendaring, task and note management and consists of a desktop application, web application and a free sharing and back-up service called Chandler Hub. Source code.

Chandler is a Note-to-Self Organizer. It features calendaring, task and note management and consists of a desktop application, web application and a free sharing and back-up service called Chandler Hub. Windows installer.

ClamAVi for Windows is designed to provide the (original Unix/Linux) ClamAV community with a Windows Anti-Virus (AV) solution (including now On Access scanning and Removal).

ClamWin is a Free Antivirus program for Microsoft Windows 7/Vista/XP/Me/2000/98 and Windows Server 2008 and 2003 (only for manually but not for an on-access real-time scanning; based on Unix ClamAV).

Code::Blocks is an cross platform C++ IDE designed to be very extensible and fully configurable. Installer for Windows 2000/XP/Vista/7 (includes the GCC compiler and GDB debugger from MinGW).

Code::Blocks is an cross platform C++ IDE designed to be very extensible and fully configurable. Installer for Windows 2000/XP/Vista/7.

Code Browser is a folding and outlining text editor (Windows Installer).

Code Browser is a folding and outlining text editor (Windows binaries without installer).

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

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

CPU-Z gathers information on some of the main devices of your system (CPU, mainboard, memory, ...).

CPU-Z gathers information on some of the main devices of your system (CPU, mainboard, memory, ...).

CPU-Z gathers information on some of the main devices of your system (CPU, mainboard, memory, ...).

Calendarscope - a Calendar software providing Mobile Time Management (for Windows 95/98/ME/NT4/2000/XP/2003/Vista) - shareware (free 30-day trail version).

CutePDF Writer create PDF documents on the fly (installs itself as a "printer subsystem"; requires PS2PDF converter such as Ghostscript).

CutePDF Writer create PDF documents on the fly (installs itself as a "printer subsystem"; required PS2PDF Ghostscript 8.15 converter included).

CVS (Concurrent Versions System) is a version control system designed for software projects. Windows x86 binary (stable release).

CVS (Concurrent Versions System) is a version control system designed for software projects. Windows x86 binary (feature release).

Cyberduck is a FTP, SFTP, WebDAV, Amazon S3, Google Cloud Storage, Windows Azure, Rackspace Cloud Files and even Google Docs browser/client.

Dia is a diagram creation program (for entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and simple circuits). Win32 installer.

(good old) DOS tools and programs

dos2unix - DOS/MAC to UNIX (and vice versa) text file format converter

dos2unix - DOS/MAC to UNIX (and vice versa) text file format converter

Eclipse - an extensible development platform, runtimes and application frameworks for building, deploying and managing software across the entire software lifecycle (a Java IDE and much more ...). "Eclipse Classic": Eclipse Platform, Java Development Tools, and Plug-in Development Environment, including source and both user and programmer documentation (without a Java runtime environment (JRE)).

Eclipse - an extensible development platform, runtimes and application frameworks for building, deploying and managing software across the entire software lifecycle (a Java IDE and much more ...). "Eclipse Classic": Eclipse Platform, Java Development Tools, and Plug-in Development Environment, including source and both user and programmer documentation (without a Java runtime environment (JRE)).

Eclipse - an extensible development platform, runtimes and application frameworks for building, deploying and managing software across the entire software lifecycle (a Java IDE and much more ...). "Eclipse Classic": Eclipse Platform, Java Development Tools, and Plug-in Development Environment, including source and both user and programmer documentation (without a Java runtime environment (JRE)).

Eclipse - an extensible development platform, runtimes and application frameworks for building, deploying and managing software across the entire software lifecycle (a Java IDE and much more ...). "Eclipse Classic": Eclipse Platform, Java Development Tools, and Plug-in Development Environment, including source and both user and programmer documentation (without a Java runtime environment (JRE)).

Eclipse - an extensible development platform, runtimes and application frameworks for building, deploying and managing software across the entire software lifecycle (a Java IDE and much more ...). "Eclipse Classic": Eclipse Platform, Java Development Tools, and Plug-in Development Environment, including source and both user and programmer documentation.

Eclipse - an extensible development platform, runtimes and application frameworks for building, deploying and managing software across the entire software lifecycle (a Java IDE and much more ...). "Eclipse Classic": Eclipse Platform, Java Development Tools, and Plug-in Development Environment, including source and both user and programmer documentation.

Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME using both the H.323 and SIP protocols. It is interoperable with other SIP compliant software (also with Microsoft NetMeeting).

Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and also with Microsoft NetMeeting. Development version.

Euler Math Toolbox for numerical and symbolic computations. It supports symbolic mathematics using the open algebra system Maxima.

Euler Math Toolbox for numerical and symbolic computations. It supports symbolic mathematics using the open algebra system Maxima.

MS Excel Viewer lets you open, view, and print Excel workbooks, even if you don't have Excel installed.

Explore2fs is a Windows program that provides read support for Linux ext2 amd ext3 filesystems.

Exportizer is database export tool which allows to export data to file, clipboard, or printer. It can convert DB, DBF, text, CSV to text, CSV, XLS, RTF, XML, HTML, DBF, INSERT statements. There exists also a shareware Pro version.

Extrema is a visualization and data analysis tool for researchers

Extrema is a visualization and data analysis tool for researchers

FDM (Free Download Manager) is a download accelerator and manager for HTTP, FTP, and BitTorrent.

FEniCS Project is a collection of free software aimed at automated, efficient solution of differential equations. Windows installer.

FEniCS Project is a collection of free software aimed at automated, efficient solution of differential equations. Sources for Windows.

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.

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.

FileFormatConverters is Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint File Formats (open, edit, and save documents, workbooks, and presentations in the file formats new to Microsoft Office Word, Excel, and PowerPoint).

FileZilla is a fast and reliable cross-platform FTP, FTPS and SFTP client with lots of useful features and an intuitive graphical interface (for Windows XP, Vista and Windows 7 both 32 and 64 bit; also for Linux available).

FileZilla is a fast and reliable cross-platform FTP, FTPS and SFTP client with lots of useful features and an intuitive graphical interface (for Windows XP, Vista and Windows 7 both 32 and 64 bit; also for Linux available).

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 (hint: binaries of newer releasess are available only for fityk subscribers). Installer for Windows.

Free Pascal (aka FPK Pascal) is a 32 bit and 64 bit Pascal compiler for different platforms (source code available). The language syntax is semanticly compatible with TP 7.0, some extensions used by Delphi (classes, rtti, exceptions, ansistrings, widestrings, interfaces) are also supported.

Free Pascal (aka FPK Pascal) is a 32 bit and 64 bit Pascal compiler for different platforms (source code available). The language syntax is semanticly compatible with TP 7.0, some extensions used by Delphi (classes, rtti, exceptions, ansistrings, widestrings, interfaces) are also supported.

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).

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.

ftnchek is a Fortran 77 program checker (detecting unused, uninitialized, and undeclared variables) - binary executable for MS-Windows 95/98/NT

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; Windows 32-bit libraries).

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; Windows 64-bit libraries).

GIMP - The GNU Image Manipulation Program. "Unofficial" installer for Windows XP SP2 or later.

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. Full installer for Git for Windows (Beta Featured).

GnuPG (GNU's tool for secure communication and data storage) for MS-Windows.

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

Gnuplot for Win32 platforms - a command-line driven interactive function plotting utility (2D/3D) (compiled by MingW with PNG and TrueType support)

Gpg4win (GNU Privacy Guard for Windows) a secure solution for file and email encryption.

Vim (Vi IMproved) editor (vi clone) - GUI complete self-installing package (you must also get the V7.3 runtime files vim73rt.zip)

Vim (Vi IMproved) editor (vi clone) - GUI bin with OLE and VisVim (you must also get the V7.3 runtime files vim73rt.zip)

Vim (Vi IMproved) editor (vi clone) - GUI binaries for Windows 95/NT and later (you must also get the V7.3 runtime files vim73rt.zip)

HWiNFO32 - hardware information and diagnostic tools for Windows 9x/2000/XP/Vista/Server 2003/2008/Windows 7.

HWiNFO64 - hardware information and diagnostic tools for XP/Vista/Server 2003/2008/Windows 7.

ImageMagick is a software suite to create, edit, and compose bitmap images. It can also read, convert and write images in a variety of formats (over 100). Win32 dynamic at 16 bits-per-pixel (further binaries available here).

ImageMagick is a software suite to create, edit, and compose bitmap images. It can also read, convert and write images in a variety of formats (over 100). Windows source code.

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

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

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

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

IrfanView PlugIns. Note: A normal IrfanView version includes the following (most important) PlugIns: Effects, Icons, Mpg, Slideshow-EXE and Video.

IrfanView PlugIns. Note: A normal IrfanView version includes the following (most important) PlugIns: Effects, Icons, Mpg, Slideshow-EXE and Video.

IrfanView is a fast image viewer/converter for Windows 9x/ME/NT/2000/XP/2003/Vista/7 (German version).

IrfanView is a fast image viewer/converter for Windows 9x/ME/NT/2000/XP/2003/Vista/7 (German version).

IrfanView is a fast image viewer/converter for Windows 9x/ME/NT/2000/XP/2003/Vista/7.

IrfanView is a fast image viewer/converter for Windows 9x/ME/NT/2000/XP/2003/Vista/7.

KeePass Password Safe 1.x (Classic Edition) - a light-weight and easy-to-use password manager (Windows installer)

KeePass Password Safe 1.x (Classic Edition) - a light-weight and easy-to-use password manager (source code)

KeePass Password Safe 1.x (Classic Edition) - a light-weight and easy-to-use password manager (unpack it to your favorite location: USB stick, ...).

KeePass Password Safe 2.x (Professional Edition; requires Microsoft .NET Framework >= 2.0 or Mono ≥ 2.2) - a light-weight and easy-to-use password manager

KeePass Password Safe 2.x (Professional Edition; requires Microsoft .NET Framework >= 2.0 or Mono ≥ 2.2) - a light-weight and easy-to-use password manage (source code)

KeePass Password Safe 2.x (Professional Edition; requires Microsoft .NET Framework >= 2.0 or Mono ≥ 2.2) - a light-weight and easy-to-use password manager

Linphone is an internet phone or Voice Over IP phone (VoIP) using the IETF protocols SIP (Session Initiation Protocol) and RTP (Realtime Transport Protocol).

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

MatheGrafix is a program for drawing, presentation and printing graphs of functions and geometric objects. Portable version (consisting of only one single file).

Maxima is a Lisp based computer algebra system (doing mathematics calculations, symbolic manipulations, numerical computations and graphics) - a self-contained installer program (Windows 32-bit).

md5sum calculates and verifies MD5 hashes (to verify the integrity of files).

md5 is a command line utility which generates and verifies MD5 message digests (digital signatures).

MP3 Diags finds problems in MP3 files and helps the user to fix many of them (with a GUI). Also includes a tag editor and a file renamer.

MicroPlanet Gravity is an online/offline Usenet news client with an extensive feature list including Rules, Scoring, and Filters. Source code.

MPICH2 - 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 (Win IA32 binary)

MPICH2 - 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 (Win EM64T/AMD64 binary)

EMS HiTech's MySQL Manager is a MySQL Administration and Development Tool for Windows (commercial, trial version for evaluation purposes for a period of 30 days).

EMS HiTech's MySQL Manager is a MySQL Administration and Development Tool for Windows (commercial, trial version for evaluation purposes for a period of 30 days).

MyQuery is a MySQL Script and Query tool (documentation; PDF)

MyQuery is a MySQL Script and Query tool (beta version; installer) MyQuery is a MySQL Script and Query tool (beta version; source code)

MyQuery is a MySQL Script and Query tool (beta version; source code)

MySQL - SQL (Stuctured Query Language) database server (community version). Windows Installer (32-bit).

MySQL - SQL (Stuctured Query Language) database server (community version). Windows Installer (64-bit).

MySQL - SQL (Stuctured Query Language) database server (community version). Windows source code.

MySQL - SQL (Stuctured Query Language) database server (community version). Windows Installer (32-bit).

MySQL - SQL (Stuctured Query Language) database server (community version). Windows binary distribution (32-bit).

MySQL - SQL (Stuctured Query Language) database server (community version). Windows Installer (64-bit).

MySQL - SQL (Stuctured Query Language) database server (community version). Windows binary distribution (64-bit).

MySQL - SQL (Stuctured Query Language) database server (community version). Windows source code.

MySQL Control Center is a platform-independent GUI administration client, based on the QT toolkit.

MySQL - SQL (Stuctured Query Language) database server (community version). Windows x86 without installer; unzip in C:\.

MySQL - SQL (Stuctured Query Language) database server (community version). Windows AMD64 / Intel EM64T without installer.

MySQL Workbench is an extensible visual database modeling tool for MySQL. You can use it to design and create new database schemas, document existing databases and even perform complex migrations to MySQL. Source code with required Windows dependencies (Visual Studio 2005 SP1 Standard Edition is required for building) - beta version.

MySQL Workbench is an extensible visual database modeling tool for MySQL. You can use it to design and create new database schemas, document existing databases and even perform complex migrations to MySQL. Source files.

MySQL Workbench is an extensible visual database modeling tool for MySQL. You can use it to design and create new database schemas, document existing databases and even perform complex migrations to MySQL. Windows Installer (x86).

MySQL Workbench is an extensible visual database modeling tool for MySQL. You can use it to design and create new database schemas, document existing databases and even perform complex migrations to MySQL. No installer (unzip in C:\Program Files\MySQL AB).

namebench is a DNS benchmark utility.

Notepad++ is a free source code editor and Notepad replacement that supports several computer languages (binary)

Notepad++ is a free source code editor and Notepad replacement that supports several computer languages (binary)

Notepad++ is a free source code editor and Notepad replacement that supports several computer languages (installer)

Notepad++ is a free source code editor and Notepad replacement that supports several computer languages (source code)

Octave is a high-level language for linear and nonlinear numerical computations mostly compatible with Matlab. Windows installer.

Octave is a high-level language for linear and nonlinear numerical computations mostly compatible with Matlab - source code

ODC (OPeNDAP Data Connector) allows to search for and retrieve datasets published by OPeNDAP data servers (for e.g. climatic data, satellite imagery, and ocean sensor results) - self-extracting exe including Java runtime.

out-dated or old archives

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. The 1.7 series is targeted at Microsoft Windows only (native File System client for Microsoft Windows available). Documentation.

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. The 1.7 series is targeted at Microsoft Windows only (native File System client for Microsoft Windows available).

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. Installer for 32-bit Applications on 64-bit Windows operating systems.

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. Installer for 32-bit Windows operating systems.

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. Installer for 64-bit Windows operating systems.

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 (32 bit).

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 (64 bit).

Eclipse - an extensible development platform, runtimes and application frameworks for building, deploying and managing software across the entire software lifecycle (a Java IDE and much more ...). Example Plug-ins.

ParaView is a scientific visualization application for large data sets (Windows installer; development version).

ParaView is a scientific visualization application for large data sets (Windows installer; development version).

ParaView is a scientific visualization application for large data sets (Windows installer; development version).

PDFCreator creates PDFs from any Windows program (use it like a printer).

PDFCreator creates PDFs from any Windows program (use it like a printer). Source code.

PeaZip is a flexible, portable, secure, and free file and archive manager (AMD64 32-bit Windows; installer, needs to run with administrative privileges).

PeaZip is a flexible, portable, secure, and free file and archive manager (i386 32-bit Windows; installer, needs to run with administrative privileges).

PeaZip is a flexible, portable, secure, and free file and archive manager (AMD64; standalone ZIP).

PeaZip is a flexible, portable, secure, and free file and archive manager (i386; standalone ZIP).

PlanMaker Viewer 2010 is a document viewer for common spreadsheet formats (Microsoft Excel, PlanMaker) and more.

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. Portable application for Git for Windows (Beta Featured).

MS Powerpoint Viewer lets you view full-featured presentations created in PowerPoint 97 and later versions.

PSPad is a Windows programmer's editor (syntax highlighting, text formatting, extension capabilities and more).

pstoedit translates PostScript and PDF graphics into other vector formats. 32-bit binary.

pstoedit translates PostScript and PDF graphics into other vector formats. 64-bit binary.

Periodic Table Explorer contains all the elements of the Periodic Table along with images of the elements in their natural state, as well as lots of other information and interactive displays. Windows installer.

Periodic Table Explorer contains all the elements of the Periodic Table along with images of the elements in their natural state, as well as lots of other information and interactive displays.

PuTTY is a free implementation of Telnet and SSH for Windows (and Unix), along with an xterm terminal emulator. Windows installer for everything except PuTTYtel.

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

PuTTY is a free implementation of Telnet and SSH for Windows (and Unix), along with an xterm terminal emulator. Documentation (HTML-format).

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

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

PuTTY is a free implementation of Telnet and SSH for Windows (and Unix), along with an xterm terminal emulator. All binaries except PuTTYtel (PuTTY itself + SCP-client, SFTP-client, SSH authentication agent, ...)

Password Safe is a password manager allowing a user to remember only one password (the "master passsword") instead of all the used username/password combinations.

Password Safe is a password manager allowing a user to remember only one password (the "master passsword") instead of all the used username/password combinations.

Password Safe is a password manager allowing a user to remember only one password (the "master passsword") instead of all the used username/password combinations.

Q-Dir (v4.86) - a fast files and folder manager with a Quadro-View technique (you don't have to renounce the usual, Drag and Drop, all Views, and other functions of your system).

Q-Dir (v4.86) - a fast files and folder manager with a Quadro-View technique (you don't have to renounce the usual, Drag and Drop, all Views, and other functions of your system).

Q-Dir (v4.86) - a fast files and folder manager with a Quadro-View technique (you don't have to renounce the usual, Drag and Drop, all Views, and other functions of your system).

Quantum GIS (QGIS) is a cross-platform Geographic Information System (GIS) that supports vector, raster, and database formats. Standalone Installer (including GRASS).

Quantum GIS (QGIS) is a cross-platform Geographic Information System (GIS) that supports vector, raster, and database formats. Standalone Installer (including GRASS).

Quick Checksum Verifier checks file integrity by secure time proven algorithms like MD5 and SHA-1 (simply by drag and drop). 64-Bit.

Quick Checksum Verifier checks file integrity by secure time proven algorithms like MD5 and SHA-1 (simply by drag and drop). 32-Bit.

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. Windows 32-bit community edition.

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. Windows 64-bit community edition.

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. Java binary Zip archive.

Recuva recovers files deleted from your Windows computer, Recycle Bin, digital camera card, or MP3 player. Recuva is a recovery tool for accidentally deleted files. Hint: Besides this "Free" version ther are also a "Home" and a "Business" version available.

The ROOT system - an OO framework for large scale scientific data analysis and data mining (production version; installer package for Windows 7/Vista/XP/NT/2000 with VC++ 7.1)

The ROOT system - an OO framework for large scale scientific data analysis and data mining (production version; tar file for Windows 7/Vista/XP/NT/2000 with VC++ 7.1; the recommended version for Windows)

SAOImage DS9 is an astronomical imaging and data visualization application that supports FITS images and binary tables, multiple frame buffers, region manipulation, and many scale algorithms and colormaps (Windows 7/Vista/XP).

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.

Scilab is a scientific software package for numerical computations providing a powerful open computing environment for engineering and scientific applications. Iinstaller for Windows 2000/XP/VISTA/7.

Scilab is a scientific software package for numerical computations providing a powerful open computing environment for engineering and scientific applications. Source code.

Scilab is a scientific software package for numerical computations providing a powerful open computing environment for engineering and scientific applications. Iinstaller for Windows 2000/XP/VISTA/7.

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

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.

Scribus is a Linux desktop publishing program. Installer for Windows.

MatheGrafix is a program for drawing, presentation and printing graphs of functions and geometric objects. Setup file.

MicroPlanet Gravity is an online/offline Usenet news client with an extensive feature list including Rules, Scoring, and Filters.

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

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

sha1sum calculates and verifies SHA-1 hashes (to verify the integrity of files).

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

Songbird is an open-source customizable Web music/media player (for Windows XP/Vista)

Spybot - Search & Destroy an application to scan for spyware, adware, hijackers and other malicious software (free only for non-commercial use).

SSVNC is an x11vnc side-project that provides an Enhanced TightVNC Viewer with automatic SSL/SSH tunnelling support, SSL Certificate creation, saved connection profiles, and built-in Proxy support.

Stellarium is planetarium software. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.

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

Task Coach is a todo manager to keep track of personal tasks and todo lists. Installer (Windows 2000, XP, Vista, Windows 7).

Task Coach is a todo manager to keep track of personal tasks and todo lists. Source code (Python).

Task Coach is a todo manager to keep track of personal tasks and todo lists. PortableApps.com Format. Installer (Windows 2000, XP, Vista, Windows 7).

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 (source code).

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 (Windows binary).

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)

Tera Term Pro is a software terminal emulator (communication program) which supports for e.g. serial port and TCP/IP (telnet, SSH1, SSH2) connections, different emulations and UTF-8 character encoding.

Texmaker is a cross-platform LaTeX editor that integrates many tools needed to develop documents with LaTeX, in just one application. Executable file for Windows XP, Vista and 7 (works also on Windows 7 64 bits).

Texmaker is a cross-platform LaTeX editor that integrates many tools needed to develop documents with LaTeX, in just one application. Portable version for Windows XP, Vista and 7 (works also on Windows 7 64 bits).

TightVNC is an enhanced version of VNC (Virtual Network Computing), allowing remote network access to graphical desktops (self-installing package). For Windows 95/98/ME, Windows NT 4.0, or in Unix-like systems (including Linux).

TightVNC is an enhanced version of VNC (Virtual Network Computing), allowing remote network access to graphical desktops (source code). For Windows 95/98/ME, Windows NT 4.0, or in Unix-like systems (including Linux).

TightVNC is an enhanced version of VNC (Virtual Network Computing), allowing remote network access to graphical desktops (Viewer executable, does not require installation). For Windows 95/98/ME, Windows NT 4.0, or in Unix-like systems (including Linux).

TightVNC is an enhanced version of VNC (Virtual Network Computing), allowing remote network access to graphical desktops (self-installing package). For Windows 2000 Professional, 2000 Server; XP, 2003 Server; Vista, 2008 Server; 7, 2008 Server R2. Performance may be notably lower in 64-bit versions of Windows.

TextMaker Viewer 2010 is a document viewer for common word processing formats (Microsoft Word, TextMaker, OpenDocument) and more.

TrueCrypt - on-the-fly disk encryption software (source code)

TrueCrypt - on-the-fly disk encryption software (Windows 7/Vista/XP/2000)

TUGZip is an archiving utility that provides support for a wide range of compressed, encoded and disc-image files (with Windows Explorer integration).

TightVNC Remote Control / Remote Desktop Software - Java Viewer. Binary (JAR).

TightVNC Remote Control / Remote Desktop Software - Java Viewer. Source code.

TightVNC Remote Control / Remote Desktop Software - Server. Source code.

TightVNC Remote Control / Remote Desktop Software - Viewer. Source code.

uDig ("User-friendly Desktop Internet GIS") is a desktop application framework for GIS data access, editing, and viewing, built with Eclipse Rich Client (RCP) technology. Windows x86 64-bit installer.

uDig ("User-friendly Desktop Internet GIS") is a desktop application framework for GIS data access, editing, and viewing, built with Eclipse Rich Client (RCP) technology. Windows x86 64-bit.

uDig ("User-friendly Desktop Internet GIS") is a desktop application framework for GIS data access, editing, and viewing, built with Eclipse Rich Client (RCP) technology. Windows x86 32-bit installer.

uDig ("User-friendly Desktop Internet GIS") is a desktop application framework for GIS data access, editing, and viewing, built with Eclipse Rich Client (RCP) technology. Windows x86 32-bit.

UltraVNC - remote control software to access distant computers. Full installer win32.

UltraVNC - remote control software to access distant computers. Source code.

UltraVNC - remote control software to access distant computers. Full installer X64.

uncrustify is a configurable source code beautifier for C, C++, C#, ObjectiveC, D, Java, Pawn and VALA (source code).

uncrustify is a configurable source code beautifier for C, C++, C#, ObjectiveC, D, Java, Pawn and VALA (Windows i386 binary).

UNICORE 6 standalone Rich Client, based on Eclipse (prerequisites: Sun Java 5 or 6 JRE or SDK).

Info-ZIP - portable extraction utility for archives compressed in .zip format (UnZip 6.0, 32-bit(i386) Windows DLL and docs).

Info-ZIP - portable extraction utility for archives compressed in .zip format (UnZip 6.0, 32-bit(i386) Windows Intel exes/docs).

vile is a text editor similar to Unix "vi", with extended capabilities in many areas, including: multi-file editing and viewing, mouse support, infinite undo, additional operators, rectangular operations.

Vim (Vi IMproved) editor (vi clone) - runtime files

Vim (Vi IMproved) editor (vi clone) - source code

Vim (Vi IMproved) editor (vi clone) - binaries for Windows NT/XP console

VirtualDub is a video capture/processing utility (experimental, 64-bit(x64) version).

VirtualDub is a video capture/processing utility (experimental, 32-bit(x86) version).

VirtualDub is a video capture/processing utility (for x64 Extended version of Windows).

VirtualDub is a video capture/processing utility.

MS Visio 2010 Viewer allows to view Visio drawings and diagrams (created with Visio 5.0 through Visio 2010) inside the MSIE browser.

Visit is an interactive parallel visualization and graphical analysis tool for viewing scientific data (MSVC9, Visual Studio 2008; for Windows Xp/Vista/7). 32-bit.

Visit is an interactive parallel visualization and graphical analysis tool for viewing scientific data (MSVC9, Visual Studio 2008; for Windows Xp/Vista/7). 64-bit.

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 (for Windows 2000 (SP4+UR1), XP, Vista and 7). Exe Installer package.

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 (for Windows 2000 (SP4+UR1), XP, Vista and 7). Zip package (no installer needed).

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 (for Windows 2000 (SP4+UR1), XP, Vista and 7). Exe Installer package. Relase candidate.

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 (for Windows 2000 (SP4+UR1), XP, Vista and 7). Zip package (no installer needed). Relase candidate.

RealVNC (Virtual Network Computing) - Free Edition for Windows - cross-platform remote control between Windows and Unix/Linux computers (full source code to both Viewer and Server for Windows). Hint: Newer commercial version available.

RealVNC (Virtual Network Computing) Free Edition for Windows - cross-platform remote control between Windows and Unix/Linux computers (Installer including both Server and Viewer). Hint: Newer commercial version available.

RealVNC (Virtual Network Computing) - Free Edition for Windows - cross-platform remote control between Windows and Unix/Linux computers (stand-alone Viewer only). Hint: Newer commercial version available.

VTK (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. Installer.

VTK (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. Source code.

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

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

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

Winamp Media Player (audio, video ...) - German version

Winamp Media Player (audio, video ...) - English version

Wink is a Tutorial and Presentation creation software, primarily aimed at creating "flash" tutorials on how to use software. Wink can capture screenshots, add explanations boxes, buttons, titles etc and generate a highly effective tutorial for your users.

WinMerge is a visual text file differencing and merging tool (installer version).

WinMerge is a visual text file differencing and merging tool (soure code; development version).

WinMerge is a visual text file differencing and merging tool (installer version; development version).

WinMerge is a visual text file differencing and merging tool (soure code).

WinSCP - SFTP (SSH File Transfer Protocol), SCP (Secure CoPy) and FTP(S) client for Windows using SSH (Secure SHell) - installation package.

WinSCP - SFTP (SSH File Transfer Protocol), SCP (Secure CoPy) and FTP(S) client for Windows using SSH (Secure SHell) - source code.

WinSCP - SFTP (SSH File Transfer Protocol), SCP (Secure CoPy) and FTP(S) client for Windows using SSH (Secure SHell) - portable executable.

WinSCP - SFTP (SSH File Transfer Protocol), SCP (Secure CoPy) and FTP(S) client for Windows using SSH (Secure SHell) - installation package. Beta version.

WinSCP - SFTP (SSH File Transfer Protocol), SCP (Secure CoPy) and FTP(S) client for Windows using SSH (Secure SHell) - source code. Beta version.

WinSCP - SFTP (SSH File Transfer Protocol), SCP (Secure CoPy) and FTP(S) client for Windows using SSH (Secure SHell) - portable executable. Beta version.

vile is a text editor similar to Unix "vi", with extended capabilities in many areas, including: multi-file editing and viewing, mouse support, infinite undo, additional operators, rectangular operations (Windows installer; with Unicode support).

WinZip Wizard compression utility. 45-day Evaluation Version (English version).

WinZip Wizard compression utility. 45-day Evaluation Version (English version).

WinZip Wizard compression utility. 45-day Evaluation Version (English version).

Info-ZIP - WiZ GUI (Zip and UnZip), NT/9x Intel exe/DLL/docs.

MS Word Viewer let you view, print and copy Word documents, even if you don't have Word installed.

NASA World Wind lets you zoom from satellite altitude into any place on Earth (Windows 2000 or XP; 3D graphics card and fast internet connection required).

NASA World Wind lets you zoom from satellite altitude into any place on Earth (Windows 2000 or XP; 3D graphics card and fast internet connection required). World Wind lets you zoom from satellite altitude into any place on Earth (Windows 2000 or XP; 3D graphics card and fast internet connection required; source code)-

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. This zio-file contains the SciTE executable, any required DLLs, configuration files and documentation.

WinZip Wizard compression utility. 45-day Evaluation Version (German version).

XnView is software to view, organise, convert graphics and photos files or to create slide show, contact sheet, HTML pages (multi-language setup; free only for private non-commercial, educational use and non-profit organizations). Setup version (multi-language).

XnView is software to view, organise, convert graphics and photos files or to create slide show, contact sheet, HTML pages (multi-language setup; free only for private non-commercial, educational use and non-profit organizations). Zip file (multi-language).

Info-ZIP - portable compression/archiver utilities (Zip 3.0), MS Windows 64-bit x64 binaries and docs.

Info-ZIP - portable compression/archiver utilities (Zip 3.0), MS Windows 32-bit x86 binaries and docs.