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- Electronic Literature Foundation
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- Fiction.us
- Foreo
- Free Booksy
- Free Classic Books
- Free Computer Books
- Free Ebooks
- Free Library of Philadelphia
- FullBooks.com
- Global Digital Library
- globalforgivenessinitiativ e.com
- Goodreads
- Google Books
- HathiTrust Digital Library
- Hoopla
- iBiblio
- International Children’s Digital Library
- Junky Books
- KOBO.com
- Library of Congress
- LibriVox
- Little Free Library
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- Manybooks
- MyPustak.com
- National Digital Library of India
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- OAPEN
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- OpenDOAR
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- OverDrive
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- Page by Page Books
- PDF Books World
- Perseus Digital Library
- Planet eBook
- Project Gutenberg
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- PublicLiterature.org
- PubMed
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- Sacred Texts
- Scribd
- Smithsonian Library
- Social Science Research Network
- The British Library
- The Classic Bookshelf
- The Literature Network
- The Online Books Page
- UC Berkeley Library guide
- Unitedkhoisan.co.za
- Universal Digital Library
- Wikibooks
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- Wiley Online Library
- World Digital Library
- Worldreader
- Z- Library Project
Journal Articles
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