The ClearBlade Novi iOS SDK by ClearBlade allows developers to interact with the ClearBlade platform, for their iOS applications. More information about the API can be found here http://docs.clearblade.com/v/2/3-Developer_Reference/iOS/API_Reference
The Burstly Skyrocket API for download tracking of conversions from mobile ads uses as RESTful http interface. More than 300,000 apps use Burstly services to beta test, analyze and monetize their offerings. By spanning the development process from end to end, Burstly's newly structured offerings give developers the choice between choosing among Testflight, Flightpath, and Skyrocket, or using them all.
Ebook Glue creates simple publishing tools that ease the process of readying content for electronic reading devices. Its flagship product, the Ebook Glue API, constitutes a straightforward tool that converts content to an ebook that its easily read on an ereader (iPad, Kindle, Nook, iPhone, Android device, etc.). As long as the content can be sent over HTTP, Ebook Glue can convert content to an ebook.