Car-race game based on OpenGl purely written in C
https://github.com/horde3d/Horde3D
A complete 2D Game Engine with built in drag and drop editor
Multi-Language Wrapper Collection for the Irrlicht Engine
Free vector,quaternion,matrix math library
Megalui: 2D/3D OpenGL & C/C++ Library for Scientific Visualizations
An OpenGL sample application
Displays your photos on the walls of a maze
A 3D rendering / entity engine
Free and open source FPS based on Quake III Arena
A DirectX based graphics/physics engine
Quick project: Phong, Gouraud, Flat shading program (wire-frame also)
An adaptation of the well-known "Tetris" game.