Hulu is one of the most popular online streaming sites, and its catalog of movies and television series is extensive. Hulu is a joint effort from studio heavyweights NBC Universal, Fox Broadcasting and Disney-ABC. The library of programming on Hulu draws heavily from the properties owned by Hulu's founders. You'll find plenty of movies and TV from other sources on Hulu as well, thanks to agreements between the site and other content producers.
Hulu is supported by advertisers, so you'll have to sit through some commercials during the programs you watch on the site, even full-length movies. Ads air during programs even for Hulu Plus subscribers; the site claims that ads allow it to keep the subscription price low.