OpenGL port of the classic 6dof 3D shooter Descent
Modern 3D engine and IDE written using C# and C++.
IGS Labs
3D driving simulation based on Open Dynamics Engine
Highly realistic and immersive model for Flightgear.
Bot for id Software's Wolfenstein 3D
Open Game Bootstrap
3D vehicle simulator based on Lagrangian dynamics to simulate dynamics
Pear3DEngine is a modern and modular 3D development framework
A small bizarre early-3D horror game.
Free and open source FPS based on Quake III Arena
simple game from the XNA Extreme 101 series