Lastfm-as3 is a library for accessing the Last.fm API from ActionScript. This library is a work in progress, and it doesn't yet cover all of the API's services.
Crowd.fm is an easy-to-use platform created to promote events online. It's been described by its founder Tekin Suleyman as "an amazing platform for getting events listed with a single click." The company provides the Crowd.fm API to provide developers integration options.
Five APIs have been added to the ProgrammableWeb directory today in Bots, Education, Music, Printing and Email categories. Here is a quick summary of what is new in the directory.
Senzari, a cutting-edge music technology company, has launched MusicGraph, a knowledge engine for music that is modeled after a semantic network and powered by an API with an architecture that is similar to Facebook Open Graph Protocol. Senzari has also released a MusicGraph API which allows developers to retrieve objects from the MusicGraph.