CarWorld driving simulator
- Small driving simulator/demo with open source code
- http://carworld.sourceforge.net/

Danger from the Deep
- Danger from the deep (aka dangerdeep) is a Free / Open Source World War II german submarine simulation. [Linux / Windows] (C++)
- http://dangerdeep.sourceforge.net/

The Blue Mango Quest
- 3D arcade game written in C/C++ and using openGL. The goal is to extend the pacman-style gameplay. This game runs both on Linux and win32 platforms and is released under the GPL License.
- http://mangoquest.sourceforge.net/index.php?lang=en

Critical Mass
- SDL/OpenGL space shoot'em up game
- http://criticalmass.sourceforge.net/

glChess - A 3D chess interface
- An open source 3D chess interface. It uses OpenGL and GtkGLArea (from GTK+) for UNIX platform.
- http://glchess.sourceforge.net/

Possible Worlds
- subwar / wing Commander - style openGL accelerated 3D game that runs both under Linux and Win 9x / NT / 2k.
- http://possibleworlds.sourceforge.net/

FooBillard
- Free OpenGL billard game for linux
- http://foobillard.sunsite.dk/

Kokak's Doom Page
- DoomGL (OpenGL compatible port of Doom) and ZDoomGL (OpenGL port of ZDoom, an advanced Doom sourceport)
- http://www.doomworld.com/doomgl/

Boson
- A real-time Linux strategy game for two players for KDE (Open Source, GNU GPL)
- http://boson.eu.org/

Tux Racer
- An Open Source project in which the user takes the form of Tux (the Linux Mascot) and races downhill through alpine trails.
- http://tuxracer.sourceforge.net/

S3D Connector
- Online game finder and ELO ladder ranking for Sea3D Windows based 3-dimensional Settlers software.
- http://www.s3dconnector.net/

Vega Strike
- Describes space simulation in which players trade and bounty hunt. Includes features, forum, manual, and downloads of beta versions
- http://vegastrike.sourceforge.net/

The Ur-Quan Masters
- Multi-platform port based on the now public-domain source-code of Star Control II.
- http://sc2.sourceforge.net/

Doomsday
- Win32/Linux source port of Doom, Heretic and Hexen with OpenGL and Direct3D support for graphics, and DirectX/A3D for 3D sound effects.
- http://www.doomsdayhq.com/

Marathon
- Microsoft's own Open Source Initiative, using the GPL'ed Marathon 2 source code, called Aleph One.
- http://source.bungie.org/

PrBoom
- A Doom engine that closely emulates the original game.
- http://prboom.sourceforge.net/

Doom Legacy
- Port of ID Software's classic Doom game with OpenGL
- http://legacy.newdoom.com/

Glest
- Free 3d real time strategy project
- http://www.glest.org

Tuxedo T. Penguin: A Quest for Herring.
- A free and open source 3D game, that uses OpenGL, which is staring the famous penguin Tux from Linux. (GNU GPL)
- http://tuxaqfh.sourceforge.net/

OpenGL Games
- An index of commercial, free, open source, and freeware OpenGL based games.
- http://home.pacbell.net/freundj/openglgames/

3D Mines
- SGI MineSweeper game in OpenGL
- http://www.ai.sri.com/~reddy/3dmines

Cannon Smash
- A free and open source 3D ping-pong game based on OpenGL. (GNU GPL)
- http://cannonsmash.sourceforge.net/

BZFlag
- Free multiplayer multiplatform 3D tank battle game. Irix, Linux, BSD, Windows, Mac OS X and SGI platfor
- http://bzflag.sourceforge.net

BillardGL
- Free OpenGL billiard game for Windows and Linux with sources under GPL licence
- http://www.tobias-nopper.de/BillardGL/index-en.html

Ani(mated)-Chess
- an OpenGL front end for a CHESSTOOL such as gnuchess.
- http://www.cs.virginia.edu/~mem5w/anichess/