Partyhero - Pass your friends the aux!
Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
Join My Playlist - Listen to music live together with your friends in Spotify.
Hyperbeam - A better way to watch together online
OutLoud Social Jukebox - Control the music with your friends in real-time
Metastream - Watch streaming media with friends