Spotify - Map shows when two people play same song at same time
Google Duo - Google's answer to Facetime, high-quality video calling on iOS and Android.
SOUNDS - Discover music with friends
GoRemote - A free & simple yet powerful European based solution to go remote. Video & audio conferences, screen sharing & chat with end to end encryption. Keep your team close and productive
Songlink - Share music with anyone.
Around - Find people to hang out with.