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Wikibooks is a Wikimedia project for collaboratively writing open-content textbooks.
OpenStax provides free, peer-reviewed, openly licensed textbooks.
Bookboon is an online library of downloadable ebooks covering business, personal development, and academic subjects. It serves students and professionals who want...
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Project Gutenberg is a library of over 60,000 free eBooks. The collection contains mostly classics, which are available in various formats for...
Wikipedia is a free online encyclopedia, created and edited by volunteers around the world.
Scholarpedia is a peer-reviewed open-access encyclopedia written by scholars worldwide.
LibriVox is a volunteer community producing free recordings of public-domain books. It serves listeners who want downloadable classic audiobooks, with recordings organized...
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