Excelsior OWL The Excelsior College OWL is a free, comprehensive writing resource offering multimedia support. The OWL covers topics such as the writing process, documentation, grammar, and more.
Applie Math and Science Educational Repository
http://amser.org/
Khan Academy Has over 2100 videos, mostly about math and science topics
http://www.khanacademy.org/
Rice University's Connexions
http://cnx.org/
MERLOT online course portal includes links to course materials and whole courses
http://onlinecourses.merlot.org/beyond.html
The Open Culture website says it has links to 725 free courses http://www.openculture.com/freeonlinecourses
Dan Colman at Stanford University is the the "lead editor" of the site.