Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
MovieTag - Find and organise movies, for free
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.
Peepflix - Social platform for movie lovers to know what friends are watching.
Metastream - Watch streaming media with friends
Kids-In-Mind - Kids-In-Mind is a website that strives to equip parents and adults with information to help them assess if a movie is suitable for kids.