SRGMediaPlayer-iOS - The SRG Media Player library for iOS supplies a simple way to include a common audio / video player to any iOS application. FSNetworking - Foursquare iOS networking library. CocoaAsyncSocket - Asynchronous socket networking library for Mac and iOS. RestKit - RestKit is an Objective-C framework for iOS that aims to make interacting with RESTful website expert services very simple, rapidly and exciting.