Academic Earth  Online courses from the world's top scholars.
 edX The Futue of Online Education.
Einztein  The Social Learning Network.
Khan Academy
 Watch. Practice. Learn almost anything for free.
 MIT OpenCourseWare
 Free Online Course Materials.
OEDB Online Education Database.
Open Culture
 The best free cultural & educational media on the web.
 Stanford University Stanford's Free Online Courses.
TED Ideas worth spreading.
 Textbook Revolution Free educational materials.
YouTube EDU
 Academic video collection.