InstagramKit is an Objective C wrapper for the API. It aims to interact with Instagram's model objects using blocks-based architecture and asynchronous JSON response. Cocoapods is required to install. If this is the first time developers create an app, they need to register in Instagram's client site. A demo project exists to discover how the engine can be used. InstagramKit is not supported by Instagram or Facebook. For more info, contact Shyam Bhat @bhatthead
Facebook has updated the Facebook SDK 3.1 for iOS, adding the ability to integrate Facebook in iOS 6 as well as other new features. Apple has added several new native features in iOS 6 including Auth dialog and view controller (share dialog). The Facebook SDK supports the use of these APIs.
NASA has released a new API (the EPIC API) which provides programmatic access to images pulled from the EPIC camera. EPIC sits upon the DSCOVR satellite and constantly provides images from the Earth's sunlit side. Developers can retrieve images from the camera along with associated metadata.