Windows/Mac/Linux/Apple TV: Open-source media centre application Boxee gained a lot of notoriety for seamlessly integrating web-based TV shows with a remote-friendly, ten-foot interface. Now they're aiming to bring more web-based movies to their Movie Library.
Streaming, online movies aren't quite as ubiquitous as online TV - at least in terms of major release content -but that doesn't mean you can't find a ton of really good independent films, documentaries, and B-movies. Boxee already has Hulu and YouTube integration, which brings a lot of That's what the current implementation of Boxee's movie library is all about. It integrates with online movie sites EZTakes, Indie Movies Online, MUBI* and Openfilm to bring thousands of free movies to Boxee.
Boxee also says they'll be adding more movies and movie services soon.
Boxee Gets a Movie Library, Actually A Few Of Them [Boxee Blog]