Cocos2d is an open source 2D game framework. The original Cocos2D framework is written in python but has since been ported to other languages and platforms.

Most notably cocos2d-iphone written in Objective-c targets iOS and MAC OS -X. Cocos2D-X is written in C++ and targets mainly iOS, Android and other mobile platforms. There is also cocos2d-iphone-android for Android written in Java, Cocos2d-html5 and cocos2d-javascript for web development and a variety of other, less popular ports.

Yash future Tech is working in cocos2d game engine