An OpenGL racing game featuring Tux, the Linux mascot. The goal of the game is to slide down a snow- and ice-covered mountain as quickly as possible.(C++, TCL) [Linux, MacOS X]

Clone of the classic game "Paradroid". (C, Python) [MacOS, Windows 95/98/2000, Linux]

Free isometric real-time MMORPG. 2d/3d graphics, 3d sound effects, digital ambient music.

The encyclopedia of free (as in freedom) games with free content.

Danger from the deep (aka dangerdeep) is a Free / Open Source World War II German submarine simulation. [Linux / Windows] (C++)

Colonize Europe in this Java based, open source game. Live an adventure in the 12th century world.

irrlamb is a 3D game that probably involves a lot of physics and frustrating gameplay. (C++) [Linux, Windows] [GPL2]

CSPoker is a lightweight poker client/server. Client implementations in Java and Flash. XML-based API. (Java) [GPLv2]

Holtz is a GPL implementation of the abstract strategy board games Zèrtz and Dvonn from the GIPF project. (C++) [Linux, Windows] [GPLv2]

2D single player space strategy, combat, and trading game. (C++) [OS Independent]