IMDb is the world's most popular and authoritative source for movie, TV and celebrity content. We offer a searchable database of more than 250 million data items including more than 4 million movies, TV and entertainment programs and 8 million cast and crew members. IMDb launched online in 1990 and has been a subsidiary of Amazon.com since 1998.

MovieLens is a research site run by GroupLens Research at the University of Minnesota. MovieLens uses "collaborative filtering" technology to make recommendations of movies that you might enjoy, and to help you avoid the ones that you won't. Based on your movie ratings, MovieLens generates personalized predictions for movies you haven't seen yet. MovieLens is a unique research vehicle for dozens of undergraduates and graduate students researching various aspects of personalization and filtering technologies.

As the leading online aggregator of movie and TV show reviews from critics, they provide fans with a comprehensive guide to what’s Fresh – and what’s Rotten — in theaters and at home.

Ever met someone with a frighteningly similar taste? They discovered that this is often the best person to suggest something you might like. Your recommendations come from the collective souls of people who are oddly similar to you.