Jitsi

The world’s best video conferences are built on Jitsi. Jitsi is a set of open-source projects that allows you to easily build and deploy secure videoconferencing solutions. At the heart of Jitsi are J...
Language(s): Java
Operating system(s): Linux, Mac OS X, Windows
License: Apache License 2.0

Jmol

Jmol is a free, open source molecule viewer for students, educators, and researchers in chemistry, biochemistry, physics, and materials science. It is cross-platform, running on Windows, Mac OS X, and...
Language(s): Java
Operating system(s): Linux, Mac OS, Unix, Windows
License: GNU Lesser General Public License 2.0

KGeography

KGeography is a Free and open source educational software game that tests students geographical knowledge. It forms part of KDE SC 4. Current version ships with KDE Education Project 3.5....
Language(s): N/A
Operating system(s): Unix, Linux, Mac OS
License: GNU General Public License

Kdenlive

Kdenlive is a free and open-source video editing software based on the MLT Framework, KDE and Qt. The project was started by Jason Wood in 2002, and is now maintained by a small team of developers. ...
Language(s): C++ (Qt, KF5)
Operating system(s): Windows, Mac OS X (source code only)
License: GNU GPLv2+

Krita

Krita is a FREE and open source painting tool designed for concept artists, illustrators, matte and texture artists, and the VFX industry. Krita has been in development for over 10 years and has had a...
Language(s): C++, Qt
Operating system(s): Unix, Linux, Windows, Mac OS
License: GPLv2 or later.