Over the past two years, Yale has released fifteen free "open courses." Initially, these courses were only available through Yale's web site and later YouTube. Now, they're also accessible through iTunesU -- which means that you can put these courses on your iPod with relative ease. Just click here and scroll down, and you'll find well-produced courses that cover economics, history, literature, physics, medicine and more. Thanks to this integration with iTunes, we'll soon be able to include these courses in the Open Culture iPhone app. If you haven't played with it, give it a try. In the meantime, all Yale courses appear in our collection of Free Courses, featuring online classes from top universities.