humit - A social networking app for music sharing and discovery.
Quorus - A new way to listen to music through collaboration
Heartbeat - Listen to music with your friends together, on Spotify
ReverbNation Discover - Stream hand-picked, ad free music from emerging artists.
Twinjack - Stream Spotify music with anyone with just a link
Deezer - Deezer is a music streaming app created in France. It is available in 180 counties and gets 16 million users a month. 6 million of the users have paid subscriptions. Read more about Deezer.