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Provided by the Internet Archive library, hundreds of free courses, video lectures, and supplemental materials from universities in the United States and China. Many of these lectures are available for download.
An online collection of thousands of video tutorials on subjects such as mathematics, history, finance, physics, chemistry, biology, astronomy, and economics.
An online wiki-based collection of over two thousand open-content textbooks. Fully editable, published under the Creative Commons Attribution-Share Alike License.
A presentation from SPARC Open Educational Resources Forum, given by Richard Baraniuk, Professor of Electrical and Computer Engineering at Rice University.