Unity3D Client And C# Server Framework
Open source library for N64 development
Utility for viewing ZX Spectrum emulator snapshot files.
A 2D game engine and level editor
a game library to develop audio games
Java Gamepad API for multiple platforms
Multi-threaded 2D Renderer licensed under the Mozilla Public License
A game development kit for Sifteo Cubes.
C-Lesh is a game programming language for 2D games.