Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Twinjack - Stream Spotify music with anyone with just a link
Parallel - Listen to music with friends over Spotify at the same time
ReverbNation Discover - Stream hand-picked, ad free music from emerging artists.
aux.app - A free web-based music platform to play music from other popular online streaming services.