2D & 3D Engine Resource

http://isgl3d.com/download

http://maniacdev.com/2009/08/the-open-source-iphone-game-engine-comparison/

http://maniacdev.com/2011/01/open-source-and-commercial-ios-game-engine-listings-updated/

http://maniacdev.com/2009/08/the-open-source-iphone-game-engine-comparison/

http://maniacdev.com/2009/04/6-different-3d-and-2d-iphone-game-engines/

http://talkbinary.com/iphone-development/9-game-engines-for-iphone-development/

http://en.wikipedia.org/wiki/List_of_game_engines

http://www.burtonsmediagroup.com/blog/2010/06/game-engines-for-iphone-ipad-android-cocos2d-corona-torque-unity-3d/

http://apps.intersog.com/blog/251-using-of-3d-engines-in-ios-development

http://www.ogre3d.org/

Unreal http://www.udk.com/mobile

Unity 3D http://unity3d.com/unity/

Unreal http://www.udk.com/mobile

Unity 3D http://unity3d.com/unity/