FlightGear Flight Simulator: free open-source multiplatform flight sim
WW2 U-boat simulation
realistic driving simulation + functions for 2D/3D graphics
3D Multiplayer Hover Soccer
C++ OpenGL 3D Game Dev Lib [moved to: play.ru.net/src]
3rd Party Video Games Developer: MetalManGames, titles of games
Opengate is a Jumpgate remake
3D OpenGL dungeon game using Ada: a tribute to Narbacular Drop
A fast-paced free software rally racing game
3D space trading and combat game
Easily create resource packs for Minecraft
Build a track from wooden blocks for marbles.
3D driving simulation based on Open Dynamics Engine
A planetarium software that shows a 3D simulation of the night sky
3D Space Station Simulator (inspired by SS13)