Last.fm iOS and Mac OS X SDK is a development kit created Kevin Renskers. Using the SDK, developers can work with blocks, use only KissXML as a dependency, return values in correct data types, hook catching methods, and cancel operations. This kit is actively developed and maintained and used in the official Last.fm Scrobbler app. Other apps using Last.fm include MetroLyrics and Radio.com. Requirements to develop include iOS 4 and Xcode 4.4 or higher, an API Key obtained at last.fm/api, and Kiss XML.
In another example of the ongoing battle over copyright, LyricWiki, the popular song lyric index and wiki, recently announced a major change that significantly reduces the functionality of its API (our LyricWiki API Profile). Although the API has not been shut down completely, the recent modification removes the core functionality that allows users to retrieve song lyrics.
Our API directory now includes 27 radio APIs. The newest is the Livio Connect API. The most popular, in terms of mashups, is the BBC API. We list 28 BBC mashups. Below you'll find some more stats from the directory, including the entire list of radio APIs.