Playlist Machinery - Tools that help you create & organize your Spotify playlists
Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
Heartbeat - Listen to music with your friends together, on Spotify
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.
Partyhero - Pass your friends the aux!
Metastream - Watch streaming media with friends