Developers are often finding themselves as API providers in addition to consumers. The same is now true for me with my project, BuildaSearch. I recently released a BuildaSearch API for deeper site search integration, moving away from a more plug-and-play approach I took earlier on.
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.