Spotify - Map shows when two people play same song at same time
Partyhero - Pass your friends the aux!
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.
Join My Playlist - Listen to music live together with your friends in Spotify.
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
OutLoud Social Jukebox - Control the music with your friends in real-time