Cocos2D-X vs MonoGame: What are the differences?
Cocos2D-X: Open source game engine. Cocos2d-x is an open-source and cross-platform open source free 2D game engine for mobile game development known for its speed, stability, and ease of use; MonoGame: *A free C# framework used by game developers *. It is a free C# framework used by game developers to make games for multiple platforms and other systems. It is also used to make Windows and Windows Phone games run on other systems.
Cocos2D-X and MonoGame can be categorized as "Game Development" tools.