1. UikitanimationproYou can create animation in UIKit just like cocos2d's CCAction (also API in Sprite Kit without iOS7). It's really easy if you'll play a animation sequence.
2. PinterestswiftThis is a Swift based demo project to show how to make the transition Pinterest liked.
3. Uiview UtilsIt's a categories to make you layout views easier.Borrowed from Three20 / DTFoundation, inspired by limboy