The Klout Objective-C SDK by Camille Kander connects with the API to integrate analytics features that allow to measure business reputation. Based on sentiment analysis, developers can help users to have a voice when creating content for a specific website. HTTP and JSON formats are available for API interaction.
For music enthusiasts who thrive on insider knowledge and detailed music conversation, WhoSampled would be just their cup of tea. It's basically an online community for discovering and discussing sampled music, remixes and cover songs. WhoSampled has partnered with The Echo Nest to provide the WhoSampled API that allows developers to access and integrate its functionality with other applications.