C library for manipulating Minecraft world data
A game development kit for Sifteo Cubes.
A retro style video game engine for RPGs and adventure games.
2D Game Engine, based on OpenGL and focused on Isometric Games
Scriptable frontend for media applications.
GameWizzard is a Sprite editor.
Hungry Hero is an open source Flash game built on Starling Framework.
Open source network game service
3D world editor for game development
A very small multi-platform game engine for creating desktop games.
A truly extensible cross-platform game engine
An open source skateboard games engine written in C# and .NET.
3D Web UI, Embed Web and Flash in 3D Games, based on WebKit
Pear3DEngine is a modern and modular 3D development framework
Open Source Virtual World and MMOG Development Platform
Phobos editor is a generic resource editing system.
C++ Game programming Framework