Letterboxd - Letterboxd is a social site for sharing your taste in film, now in public beta.
Filmsomniac - Filmsomniac.com | TV Tracker | Movie Tracker
Taste - Get movie suggestions based on personal taste.
Simkl - Simkl is a TV, anime, and movie tracker that keeps a history of all the shows and movies you watch in one, central location. It’s a mobile app, a website, Google Chrome extension to keep track of everything you watch and integrates with many TV apps
Itcher - Movie, book, music & game recommendations you'll love
Trakt.tv - Automatically track TV shows & movies you're watching.