cocos2d based on OpenGL ES 1.1 for iPhone is a framework for building 2D games, demos, and other graphical/interactive applications. The library simplifies the game development in these areas:

• Defining a workflow for your game
• Creating special effects in layers
• Creating transitions between scenes
• Managing sprites
• Basic menus
• Integrated Chipmunk 2d physics engine
• Particle system
• Text rendering support
• Texture Atlas support
• Tile Map support
• Touch/Accelerometer support
• Portrait and Landscape mode
• Integrated Pause/Resume
• Language: objective-c