FreeMat

FreeMat is a free environment for rapid engineering and scientific prototyping and data processing. It is similar to commercial systems such as MATLAB from Mathworks, and IDL from Research Systems, bu...
Language(s): Assembly language, C, C++, Fortran, Qt
Operating system(s): Linux, Mac OS, Windows
License: GNU General Public License

FreeSWITCH

FreeSWITCH is designed to route and interconnect popular communication protocols using audio, video, text, or any other form of media. First released in January 2006, FreeSWITCH has grown to become th...
Language(s): C
Operating system(s): Linux, Mac OS, Solaris, FreeBSD, NetBSD, OpenBSD, DragonFly BSD, Windows
License: Mozilla Public License (MPL)

GAP

GAP is a system for computational discrete algebra, with particular emphasis on Computational Group Theory. GAP provides a programming language, a library of thousands of functions implementing algebr...
Language(s): C
Operating system(s): Cross-platform
License: GNU General Public License

GCompris

GCompris is a high quality educational software suite, including a large number of activities for children aged 2 to 10. Some of the activities are game orientated, but nonetheless still educationa...
Language(s): legacy: C Python, current: C++, QML
Operating system(s): Android, iOS, Linux, macOS, Microsoft Windows
License: GNU General Public License

GIMP

The Free & Open Source Image Editor This is the official website of the GNU Image Manipulation Program (GIMP). GIMP is a cross-platform image editor available for GNU/Linux, OS X, Windows and mo...
Language(s): C
Operating system(s): Linux, macOS, Microsoft Windows, BSD, Solaris
License: GNU GPL v3+