Open source library for N64 development
Open source library for creative expression on the web, desktop, etc.
Java decentralized cross-platform network multiplayer game engine
Multi-threaded 2D Renderer licensed under the Mozilla Public License
TurboSphere is an easy to learn and powerful JS based game engine.
Hungry Hero is an open source Flash game built on Starling Framework.
A cross-platform Java 2D graphics library using OpenGL.