SnagFilms! Thousands of Free-to-Watch Documentaries.

I've heard of this site multiple times and heard that it was great, but I had never spent the time to take a look at it. They have an amazing number of documentary films, past to current on nearly every topic imaginable. I was able to find what looks like every National Geographic movie and all for free! It looks like they currently have over 2000 documentaries and they are adding more all of the time (at least weekly - I get an update about once a week of new SnagFilms being uploaded). There is even a SnagFilms iPad app where you can watch all of the movies. The videos can be found at www.snagfilms.com