Ears.TV - Ears.TV is a movie-ranking website.
MovieLens - MovieLens helps you find non-commercial, personalized movie recommendations.
IMDb - Internet Movie Database
Letterboxd - Letterboxd is a social site for sharing your taste in film, now in public beta.
Criticker - The independent movie, TV and board game recommendation engine and community.
iCheckMovies - Keep track of what top movies you have seen.