Desktop/Android/HTML5/iOS Java game development framework
SDL based generic 2D game engine
A simple cross-platform game engine for creating old-school 2D games
A free 3D game engine to create games and realtimes scenes for Windows
C library for manipulating Minecraft world data
A game development kit for Sifteo Cubes.
Read and write PGN format and test moves for legality.
C++ SDL/Box2d Programming