A 3D, fully concurrent game engine
A cross-platform game framework based on OpenGL and GObject.
A retro style video game engine for RPGs and adventure games.
A game development kit for Sifteo Cubes.
2D Game Engine, based on OpenGL and focused on Isometric Games
A 2D tile map editor created using .NET framework.
A truly extensible cross-platform game engine
3D world editor for game development
A very small multi-platform game engine for creating desktop games.
Little game background framework in java.
A lightweight HTML5 Game Engine
UtiliGame is a light-weight game engine written in Java.
An open source skateboard games engine written in C# and .NET.
C-Lesh is a game programming language for 2D games.