Open source HTML5 game framework that offers WebGL and Canvas
Desktop/Android/HTML5/iOS Java game development framework
A simple and easy-to-use library to enjoy videogames programming
Open source library for creative expression on the web, desktop, etc.
Open source library for N64 development
Gideros Release version
Examples of procedural geometry for Unity3D C#
Asphyre is a cross-platform framework for Delphi and FreePascal.
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Open Game Bootstrap
Hungry Hero is an open source Flash game built on Starling Framework.
Delphi-like IDE for cross-platform game development