Tactical, turn-based game engine, that uses OpenGL and WinAPI
Open source, moddable game engine for the "Polygon Love 2" game
C# 2D Game Engine - Work In Progress
Easy to use 3D game engine based on OGRE 3D
WGFX 2D Game Engine
cross-platform 2d game engine
WIP Game engine
"Abysmal Depths" is a simple C++-based text adventure game engine.
RTS engine
Point-and-click 2D game engine
Cross Engine is game engine for Windows, Mac, Linux and Android
A complete 2D Game Engine with built in drag and drop editor
SDL game engine made for Ludum Dare 24
RPG Games without coding!
Cross-platform 2D game engine
A cross platform 3d c++ game engine
A 3D multiplayer RPG based in the world of Khoras.
Reference implementation for the Doom game engine.