Parallel - Listen to music with friends over Spotify at the same time

Musish - A web client for Apple Music

Join My Playlist - Listen to music live together with your friends in Spotify.

Apple Music - Apple Music app combines your personal iTunes library with Apple's music subscription service. Music you have purchased from the iTunes store, or synced over from other sources, is available in the "Library" tab. Read more about Apple Music.

TuneMeet - Chat with people who are listening to the same song

Apple Music Web App - Apple Music is now available to stream on the web