Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
&chill - Watch YouTube & Twitch videos with people online
Twinjack - Stream Spotify music with anyone with just a link
Jelly Party - Watch anything together.
Flixgang - Get connected with your friends on Netflix.
Juicebox - Spectacular HTML5 Image Galleries Made Easy