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
3D game engine for C and C++
A graphics engine + toolkit.
A truly extensible cross-platform game engine
Game development toolkit
A lightweight HTML5 Game Engine
A very small multi-platform game engine for creating desktop games.
Little game background framework in java.
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.
Pear3DEngine is a modern and modular 3D development framework
Open Source Virtual World and MMOG Development Platform
An extensible development framework for roleplay games.
cross-platform 2d game engine
Java game engine for shoot 'em ups, using Java2D.