SuperTux
- SuperTux is a classic 2D jump'n run arcade sidescroller game. The Milestone1 release of SuperTux features 9 enemies, 26 playable levels.
- http://supertux.lethargik.org

Stendhal
- Stendhal is a multiplayer online adventures game developed using the Arianne game development system.
- http://arianne.sourceforge.net/?arianne_url=games/game_stendhal

Battle for Wesnoth
- Polished turn based strategy game featuring fantasy characters and modular plots.
- http://www.wesnoth.org

Frozen Bubble
- Frozen Bubble arcade game with colorful animated penguin eyecandy
- http://www.frozen-bubble.org

Zelda2D
- Zelda2D is a free Zelda alike game
- http://zelda.netster.de

Wormux
- Use dynamite, grenades, baseball bat and others bazookas to exterminate your opponent in a 2D toon style scenery and a funny environment.
- http://www.wormux.org

VegaStrike
- VegaStrike is a 3D space simulator which allows you to trade and bounty hunt just as Prevateer or Elite.
- http://vegastrike.sourceforge.net/

LinCity-NG
- LinCity-NG is a City Simulation Game. It is a polished and improved version of the classic LinCity game.
- http://lincity-ng.berlios.de/wiki/index.php/Main_Page

OpenCity, another free 3D city simulator
- OpenCity is a 3D city simulator game project written in standard C++ with OpenGL and SDL from scratch.
- http://www.opencity.info

Abandoned Bricks game
- Abandoned Bricks is a Tetris-like cross-platform game. Beside the classic gameplay it offers music, sound effects and a duel mode.
- http://abrick.sourceforge.net

Online multiplayer poker in 3D
- Poker3d is a poker server and client. The client shows poker players in a 3D scene, animated according to the state of the game.
- http://freshmeat.net/projects/poker3d/