Pygrid is an open-source and cross-platform pygame/python 2D engine.
A cross-platform game framework based on OpenGL and GObject.
This pack add's custom object and rides into your "RCT3 Platinum" game
A multiplatform game engine for interactive fiction experiences
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
Extremely simple joystick rumble / vibration library
GameWizzard is a Sprite editor.
Scriptable frontend for media applications.
Create your own animated characters for games with ease!
Little game background framework in java.
3D Web UI, Embed Web and Flash in 3D Games, based on WebKit
Pear3DEngine is a modern and modular 3D development framework
Phobos editor is a generic resource editing system.