Cocos simplifies game creation and distribution with Cocos Creator
Eva.js is a front-end game engine for creating interactive projects
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
JavaScript-based game engine designed to empower developers
utility collection for 2D game development in Java; sound-player
A cross-platform, open-source, pure C game engine for mobile game
Amazon Lumberyard is a free AAA game engine
Game engine for playing tomb raider 1 - 5 levels.
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Turbulenz is a modular 3D and 2D game framework
Java game engine for shoot 'em ups, using Java2D.
Zap Engine