Doki Doki Literature Club - Doki Doki Literature Club is a Free to play, Casual, Indie, and Single-player Simulation created and published by Team Salvato.
Metastream - Watch streaming media with friends
Episode - Chatrooms for TV and movies
Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
Phoenix Wright: Ace Attorney Trilogy - Phoenix Wright: Ace Attorney Trilogy is an Adventure-based, Puzzle and Single-player video game developed and published by Capcom.
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.