This site has an ambitious tagline: "The best free cultural and educational media on the web." Is it successful? See for yourself! They boast "1200 Free Online Courses." "1150 Free Movies Online." "700 Free eBooks." "Learn 48 Languages Online for Free." And much more.
However, my favorite aspect of this site is the fascinating stream of blog entries in all their variety and randomness. Here are some recent favorites:
Van Gogh and Doctor Who
Lectures and Talks by Howard Zinn
How to Read Sheet Music
What Makes Alfred Hitchcock's Vertigo the Best Film of All Time? (and Five Hours of Alfred Hitchcock interviews)
The History of Russia in 70,000 Photos
You get the idea!