Parallel - Listen to music with friends over Spotify at the same time
Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
Heartbeat - Listen to music with your friends together, on Spotify
Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
JQBX - turntable.fm for spotify
myCircle.tv - Watch synchronized videos from Youtube, Dailymotion or Vimeo with your friends up to 20.