The Internet Movie Database

The Internet Movie Database (IMDb) is a HUGE collection of movie information. They catalog every pertinent detail about a movie, from who was in it, to who made it, to trivia about it, to filming locations, and even where you can find reviews and fan sites on the web. The IMDb people present this information in a manner that is easy to search and access.
The IMDb started as a hobby project by an international group of movie fans(history of IMDb), essentially something by movie fans for movie fans.
IMDb creators say "We are some of our site's most hardcore users. Our managing director claims to have seen over seven thousand movies. Most of our people could write or win a movie trivia game show. One of our proposed slogans was "we just love movies." As big and intimidating as we may seem because of our millions of monthly visitors, we're just a bunch of hardcore movie fans who still can't get over the fact that we're getting paid to keep improving this tool we use so much for our own pleasure."