Multi Theft Auto is a game engine
Cross-Platform C++ 2D/3D game engine
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
A pure Go game engine
Open-source engine for Heroes of Might and Magic III
Go 3D Game Engine
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
RTSish Game Engine
A 2D game engine and level editor
creator : Nikola Lukic about : Visual JS 2d canvas multiplatform game
Mahasona engine is an open source game engine.
Point-and-click 2D game engine