| Name | Official Link |
|---|---|
| WIKIBOOKS: Open books for an open world | https://www.wikibooks.org/ |
| UN University Full-Text Publications | https://unu.edu/publications/books |
| UC Press E-Books Collection, 1982-2004 | https://publishing.cdlib.org/ucpressebooks/ |
| The Universal Digital Library (Million Books Project) | http://ulib.isri.cmu.edu/ |
| Project Gutenberg (>60,000 Books) | https://www.gutenberg.org/ |
| OAPEN | https://www.oapen.org/home |
| NCERT e-textbooks | https://ncert.nic.in/textbook.php |
| DOAB: Directory of Open Access Books | https://www.doabooks.org/ |
