UC Berkeley
UC Berkeley webcasts offers a large selection of courses in a comprehensive list of departments -- bioengineering, Japanese, legal studies, public health. Since the webcasts are more or less recordings of actual lectures, as opposed to courses optimized for web, they lack lecture notes and supplementary materials.
However, each course has audio recordings of lectures via iTunes or video recordings of lectures via YouTube.
Click http://webcast.berkeley.edu/ link to open resource.