One framework for creating powerful cross-platform games
Vivid3D is an open-source 3D engine with powerful 2D UI.
Sdk library for creating 2048 game in c#.
2D Game Engine
Portable game engine with main focus on point-and-click adventures
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
3D .NET engine for Windows, Linux, Mac