https://github.com/MobileAnalytics/iPython-Framework
Yet another free Python framework to write iOS app, which migrated from PyObjC(https://pythonhosted.org/pyobjc/):
Come with an example game project SprityBird (from https://github.com/kirualex/SprityBird), demonstrate you how to use this framework. support storyboard, xib, protocol, sub class, nearly anything PyObjC support.