Noncredit free Harvard courses offered online by Harvard Extension School’s Open Learning Initiative. Featuring Harvard faculty, the courses are open to the public.
MIT OpenCourseWare is a free publication of MIT course materials that reflects almost all the undergraduate and graduate subjects taught at MIT. Not available for credit.
The OpenCourseWare Consortium is a collaboration of higher education institutions and associated organizations from around the world creating a broad and deep body of open educational content using a shared model.