Last.fm is a music community website that offers personalized internet radio, using a recommendation system called "Audioscrobbler" to build a detailed profile of users based on their music tastes and interests.
Pandora Radio is a free (ad-supported) internet radio founded in 2000. Using the Music Genome Project, over 400 attributes of songs are analyzed in order to personalize radio stations from music you like.
Letterboxd lets you keep track of every film you’ve seen, so you can instantly recommend one the moment someone asks, or check reactions to a film you’ve just heard about. We’re a global community of film fans who live to discuss, rate and rank what we watch.
TasteDive (formerly TasteKid) is a recommendation engine for music, movies, authors and books. Just type in your favorite bands, artists, movie titles, book titles or authors, separated by commas, and TasteDive will suggest other things that you may enjoy.
MovieLens helps you find non-commercial, personalized movie recommendations. Rate movies to build a custom taste profile, then MovieLens recommends other movies for you to watch.
The TCI is a measure of the similarity between two people's taste in films. The lower the TCI, the greater the tendency to agree on which movies ruled and which sucked.