Elsten software, digital music organizer, has announced OneMusicAPI. Proclaimed to be "OneMusicAPI to rule them all," the API acts as a music metadata aggregator that pulls from multiple sources across the web through a single interface. Elsten founder and OneMusicAPI creator, Dan Gravell, found keeping pace with constant changes from individual sources became too tedious a process to adequately organize music.
ProgrammableWeb lists many popular Music APIs in the directory including Last.fm, 7digital and Spotify Metadata. This post features a few really creative, entertaining mashups that use a few popular Music APIs.