Free Harvard courses via Podcast

Harvard is distributing various lectures via Podcasts. I listened
to a introductory course in digital photography - it was very good. Some lectures are videocasts and some are audiocasts. You can subcribe to it via iTunes.
The RSS feed is feed://www.fas.harvard.edu/~cscie1/podcast/

Open Course Ware (OCW)

A free and open educational resource, initiated by MIT. Access to
graduate and undergraduate level course material and lecture notes.
Many universities are participating and offering their material on-
line. Click on image to go to MIT/OCW site.
Enjoy.