PartyWith - Connecting people who love to party - anytime, anywhere.
Parallel - Listen to music with friends over Spotify at the same time
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Slackbox - Spotify playlist collaboration through Slack
Party Bot - A bot that helps find the best parties happening near you.
TuneMeet - Chat with people who are listening to the same song