StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.
Heartbeat - Listen to music with your friends together, on Spotify
Musictube - Listen to millions of songs on YouTube in a convenient way, much like using a traditional player.
Liyo - Stream your favorite music live with friends 🎶
Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
TuneMeet - Chat with people who are listening to the same song