The Instabug Swift SDK by Instabug provides guides to download the zip file, drag & drop framework , and initialize the SDK including lines of code provided in the SDK integration site. This is the manual resource of the Swift SDK implementation. Instabug also offers development for CocoaPods.
Zillow has released an application for iPhone users that builds on their Zillow API, the Microsoft Virtual Earth API and the iPhone's GPS capabilities. The Zillow iPhone app detects your location and shows data about nearby homes, including market values, photos, and which ones are for sale. It's a great example of a mobile mashup application that uses multiple APIs in meaningful location-aware context.