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.
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.