KlayGE is a cross-platform open source game engine
A cross-platform 2D game engine
A 2D game engine and level editor
Game engine for playing tomb raider 1 - 5 levels.
scriptable game engine with built-in support for 2D graphics and sound
Multi-platform game engine similar to old Megaman with a stage editor
2D physics engine for games
XNA based game engine completely written in c#
A roguelike game engine/editor
A generic 2D engine for any kind of game
3D Game engine
C++ Text Adventure Engine
A Simple Game Engine
Tactical, turn-based game engine, that uses OpenGL and WinAPI
Open source, moddable game engine for the "Polygon Love 2" game
cross-platform 2d game engine
RPG Games without coding!
Cross-platform 2D game engine
A cross platform 3d c++ game engine