Soundbrenner Pulse - A vibrating, wearable metronome for musicians
Spotify - Map shows when two people play same song at same time
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
SOUNDS - Discover music with friends
AddressToGPS - AddressToGPS is an open-source tool to search for an address, location, or area using the Google...
Songlink - Share music with anyone.