Hulu.com provides free ad-supported streaming of movies, TV shows, documentaries and more. Major studios such as Disney and Fox have partial ownership of Hulu, so there's a quality selection of movies available. Crackle.com is another movie-streaming service that is owned by Sony.
Independent movies and documentaries can often be found on general video-streaming sites, such as YouTube or Vimeo, for free. Although streaming sites such as Hulu and Crackle are free, the best movie-streaming experiences are paid services, such as Netflix or Hulu Plus. Netflix has the widest selection of online movies and is available on a variety of platforms.