Cocos simplifies game creation and distribution with Cocos Creator
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
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
Mahasona engine is an open source game engine.