arXiv
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Open-access preprints for scientific papers.
Education
Free, openly-licensed knowledge sources — most offline-ready as Kiwix ZIM archives you can load on any device without internet.
Internet Archive
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Digital library of millions of free books & media.
Khan Academy
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Free world-class education for anyone, anywhere.
Kiwix
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Offline content reader for ZIM file archives.
OpenStax
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Peer-reviewed, openly licensed university textbooks.
Wikipedia
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Free, multilingual encyclopedia (offline via Kiwix).
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