A complete list with reading resources and free books for either students, developers and all types of readers:
- http://libgen.li
- https://annas-archive.se/
- https://ebooks.adelaide.edu.au/meta/titles/A.html
- https://www.reddit.com/r/freeEBOOKS/wiki/febooks
- https://www.kobo.com/us/en/p/free-ebooks
- https://www.smashwords.com/
- https://manybooks.net/
- https://www.openculture.com/free_ebooks
- https://collections.stanford.edu/
- https://home.earthlink.net/~maywrite/golden.htm
- https://ww17.wocoencuk.com/
- https://www.free-ebooks.net/
- https://www.getfreeebooks.com/
- https://it-ebooks.info/
- https://www.allitebooks.com/
- https://www.engbookspdf.com/
- https://3lib.net/
- https://mega.nz/folder/gboAFRpQ#2D68ehaG1J03AOQ04EllKg/folder/MXRBjYAR Books and audiobooks
- About programming you can find a lot of free resources on Github EbookFoundation/free-programming-books
Search engines for academic resources, books and articles
- https://refseek.com is a search engine for academic resources. More than a billion sources
- https://worldcat.org search the content of 20,000 global libraries.
- https://link.springer.com access to more than 10 million scientific documents: books, articles,
- https://bioline.org.br is a library of published bioscientific journals
- https://repec.org Volunteers from 102 countries collected nearly 4 million publications
- https://science.gov is a U.S. government search engine for more than 2200 scientific sites.
- https://pdfdrive.com is the largest website for free download of PDF books. Claim more than 225 million titles.
- https://base-search.net is one of the most powerful search engines for academic research texts. More than 100 million scientific articles, 70% of which are free
