Some short demos of new stuff in iOS 7! Contents include:

• Collections Demonstration of view controller transitions using a collection view
• SpeechSynthDemo Demonstration of text to speech using AVSpeechSynthesis
• SpritesInMotion Demonstration of Sprite Kit for a simple game with particle effects
• Textra Demonstration of using JavaScriptCore to programmably alter text in a view
• WrongPong Demonstration of UIKit Dynamics to build a pong like game using UIKit

Relevant discussions on developer.apple.com:

• https://devforums.apple.com/message/857747#857748

An alternate option: https://github.com/nicklockwood/FXBlurView