Five places to download free movies (legally!)
The Internet Archive - This is the big one for all kinds of free media (it's even got video games). The Archive has loads of old movies, foreign films, documentaries, and more.
Emol - Comedy and cartoons are here. Here's where you'll find Charlie Chaplin, The Three Stooges, Bugs Bunny, and Popeye.
AngryAlien - Can't get the newest box office blockbuster available, that doesn't mean you can't still watch Fight Club, Pulp Fiction, or Star Wars.
PublicDomainTorrents - Head here for B-movies.
AtomFilms - There are some very creative films on this site made up of mostly user-created content. AtomFilms is a service of MTV Networks that serves up content to mobile phones and Web sites, but since they're partnered with Comedy Central and Spike TV there are a few gems on here if you poke around a bit.