Annie Music - The easiest way to share good music
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.
SOUNDS - Discover music with friends
BeatSense - Discover great music hand-picked by real people, in a single click. FREE and in real-time!
Spotify - Map shows when two people play same song at same time
Humm - Humm is a buy now and pays later app that allows you to purchase things up to $30000 with up to 24 months to pay.