Happy Engine

The Happy Engine is a free and open-source game engine that features a cross platform SDK and Editor(in Qt)

Happy Engine is cross-platform and it works on Mac OS X, Windows and Linux.

Here are some key features of "Happy Engine":

· 3D and 2D
· Deferred shading
· Forward shading
· Hardware shadow mapping: directional light(cascaded), spotlights and pointlights
· PhysX3.x and Box2D
· Editor(with Awesomium - HTML5) with material, effect and physics tool
· Lua scripting
· Component based entity system
· Networking