humit - A social networking app for music sharing and discovery.

Turntable.fm - Turntable.fm is a social media website developed by Billy Chasen and Seth Goldstein that allows the audience to stream their own music.

Cymbal - Music discovery powered by friends

Bandlab - Capture, nurture, and collaborate on song ideas in the cloud

Better Notes - Simple notes app that ties notes together with #hashtags

Audiu - Audiu is one of the largest platforms for the online music community, allowing users to collaborate, organize and publish their musical projects.