Open Culture bills itself as "the best free cultural and educational media on the web". As we are somewhat culturally deficient and long past our prime educatin' years, most of us don't generally spend a lot of time on the site.
Which is a shame, because Stanford professor Dan Colman and his team do a pretty incredible job of curating online classes, public domain books, music, and videos, and any number of other edifying materials. If you were so inclined, you could audit Aesthetics and the Philosophy of Art from James Grant at Oxford, or American Immigrant Experience from Carl Mason at Cal. You could dig into MIT lecturer Richard Schmalensee's Energy Decisions, Markets and Policies (TR might want to consider this one) or Stephen Pinker, Larry Summers and Michio Kaku's Great Big Ideas. You get the point.
If online courses aren't your bag, you can peruse thousands of free eBooks, mostly classics from the likes of Hemingway, Kubrick, David Foster Wallace, and Gabriel Garcia Marquez. Kids can get their learn on, too, with hundreds of K-12 courseware. There's art from The Met, music from Bach (and the Grateful Dead), and thousands of free movies.
And as of now, the world can watch all ten seasons of Bob Ross' epic The Joy of Painting series. Open Culture isn't hosting Ross' work, which originally aired on Northern Virginia's public television station, WNVC, but did let the world know that the collection is now available on YouTube.
A mere 90 seconds into this, the first-ever episode, Ross lets loose with "the almighty palette knife". The man loved his work. And we him.