a game programming library for C/C++ developers distributed freely, supporting the following platforms: DOS, Unix (Linux, FreeBSD, Irix, Solaris, Darwin), Windows, QNX, BeOS and MacOS X. It provides many functions for graphics, sounds, player input, etc..
a free multiplayer online game with 3d graphics. Become part of an epic adventure in an ever-growing universe, complete with high-tech quests, enemy factions, and explosive space battles.
real-time strategy game similar to Warcraft II released under GPL. Graphics and Textures created from shots of real models made out of plasticine! developed as a project at Faculty of Mathematics and Physics at Charles University, Prague by 6 students
a 2D fighting game in the same style as Double Dragon and TMNT. Paintown is very extensible and comes with editors to help design new levels and animations.