The Spotify Web Java Library provides a wrapper to the Spotify Web API. The library provides helper functions for interacting with your music library, authentication, browsing, searching, profiles, playlists, and music metadata.
AudioMicro’s Stock Music and Sound Effects library grants users access to over 300,000 sound files. The library includes a collection of sound effects and complete musical tracks. Spanning every musical genre (Aerobics to World) and fifty Sound Effect categories (Amusement to Whooshes), AudioMicro leader Brian Nimens described AudioMicro as an extensive sound “marketplace.”
Seevl is a new kind of music discovery engine. It allows you to find how artists are similar to each other and which artists are most similar to each other, among other things. It also allows you to comment on the notes about artists within the database. This is all well and good, but better yet, it has the Seevl API, allowing developers to integrate Seevi into their own applications.