Quorus - A new way to listen to music through collaboration
musiqpad - Musiqpad is a social-music software platform for users to host their own ‘pads’ (rooms).
Liyo - Stream your favorite music live with friends 🎶
ReverbNation Discover - Stream hand-picked, ad free music from emerging artists.
Heartbeat - Listen to music with your friends together, on Spotify
Twinjack - Stream Spotify music with anyone with just a link