Mangos ZERO is a server for World of Warcraft
Powerful, mature open-source cross-platform game engine for Python
Real-time collision detection and multi-physics simulation for VR
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
Karel - 3D language interpreter
Arkanoid game using SFML library implemented in C++
An Animated 2D Game in the Turbo Compiler.
Delphi-like IDE for cross-platform game development
Read and write PGN format and test moves for legality.