Plot: GNOME Chess is a graphical front-end featuring a 2D and a 3D chessboard interface. GNOME Chess does not include a chess engine of its own, so to play against the computer a third party chess engine must be present. Most Linux distributions package GNU Chess as the default chess engine with it. Wikipedia...
Plot: The GNOME Games collection is a collection of about 15 puzzle video games that is part of the standard free and open-source GNOME desktop environment. They have the look and feel of the GNOME desktop, but can be used without it. Wikipedia
Plot: gbrainy is a free and open brain teaser game for GNOME designed for use in education. It is licensed under the GNU GPL. The game was written in C# and has since been ported to the Sugar graphical environment, to Microsoft Windows. Wikipedia
Plot: HIARCS is a proprietary UCI chess engine developed by Mark Uniacke. Its name is an acronym standing for higher intelligence auto-response chess system. Wikipedia
Plot: Chromium B.S.U. is an arcade-style, top-scrolling space shooter available on Windows, iPhone, PSP, Mac, AmigaOS 4, Linux and numerous other UNIX-like operating systems. It is a free software distributed under the Clarified Artistic License. Wikipedia