Movie Lens
Users must rate some movies they have watched before. Based on the results, users get a personal rating prediction for other films. [Login required]
http://www.movielens.umn.edu/

MovieCritic.ca
Ratings of films dating back to the 1920s. Some films have full reviews by Luc-Rock Paquin.
http://www.moviecritic.ca/

Movie Kites
Graphical representations of film ratings on several dimensions; looks like a flying kite. The smaller the kite is, the more profound the movie is.
http://www.moviekites.com/

Critics.com
Each film's page features a list of syndicated critics' ratings of the film, links to their reviews, as well as quotes from two critics with opposing views.
http://www.critics.com

Everyone's a Critic
Allows users to rate films and compare their ratings to those of other users to obtain movie recommendations [free registration required].
http://www.everyonesacritic.net/

Matchstick Movie Finder
Requests 5 titles to generate a list of 10 related films, based on the preferences of other users and the extent to which the titles are related.
http://matchstick.com/movies/

Wait For Video
User-provided ratings for movies currently playing in theaters, with demographic breakdown by gender, location, marital status, and ethnicity.
http://www.waitforvideo.com/

Film Affinity
Allows users to rate movies and find people with similar tastes [registration required].
http://www.filmaffinity.com/

Topher's Composite Godzilla Movie Ratings
Movie ratings on all Godzilla movies by five qualified experts with a composite score also given.
http://www.lavasurfer.com/godzilla/topher-zilla-ratings.html

The Film Pie
Assigns grades to films released from 1996 to present.
http://www.thefilmpie.com/