A 2D Adventure Game & Engine
A generic 2D engine for any kind of game
AutoTeach makes kids study and learn in exchange for internet access.
Multi-threaded 2D Renderer licensed under the Mozilla Public License
Library for creating turn-based games with simultaneous moves.
TurboSphere is an easy to learn and powerful JS based game engine.
Take the chess graphism, and use it with a chess engine.
A multiplatform game engine for interactive fiction experiences
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.
2D Game Engine, based on OpenGL and focused on Isometric Games
A truly extensible cross-platform game engine
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.