| Library Genesis | http://libgen.rs/ http://libgen.is/ http://libgen.st/ | Shadow library. The king. |
| Library Genesis+ | https://libgen.gs/ https://libgen.li/ https://libgen.vg/ https://libgen.pm/ | Shadow library. An extra mirrors and scrapes other services like Sci-Hub, Anna’s Archive and of course Libgen and Libgen+ |
| Z-library | https://z-library.sx/ | Shadow library. One of the biggest and best. Login: https://singlelogin.se |
| Anna’s Archive | https://www.annas-archive.org/ https://www.annas-archive.gs/ https://www.annas-archive.se/ | Shadow library. Mirrors Sci-Hub and Library Genesis. Scrapes Z-Lib, SuXiu and more |
| Internet Archive | https://archive.org/details/texts | Nice, a lot of eBooks |
| Wikibooks | https://www.wikibooks.org/ | Book information in wiki format |
| Project Gutenberg | https://www.gutenberg.org/ | Copyright-free old books |
| OpenLibrary | https://openlibrary.org/ | Ability to borrow books |
| PDF Drive | https://www.pdfdrive.com/ | |
| PDFCoffee.com | https://pdfcoffee.com/ | For random PDF uploads |
| EBIN.PUB | https://ebin.pub/ | Looks so similar to PDFCoffee |
| EPDF | https://epdf.pub/en/ | Looks sorta like PDFCoffee and EBIN |
| Stuvia | https://www.stuvia.com/ | Lots of downloads |
| it-ebooks | https://it-ebooks.com/#gsc.tab=0 | All kinds of books in different categories |
| eBooks-IT | https://ebooks-it.org/ | Plenty of downloads 2017 and earlier |
| itbook.store | https://itbook.store/ | Lots of free and paid downloads. Was previously https://it-ebooks.info/ and https://www.it-ebooks-search.info/ |
| FreeBookCentre | https://www.freebookcentre.net/ | Free technical books and guides |
| Literature | https://www.online-literature.com/ | English literature works search |
| VetBooks | https://vetbooks.ir/ | Veterinary books |
| FreeBookSpot | https://freebookspot.pro/ | Seems like some books are removed |
| downcookbook | http://downcookbook.blogspot.com/ | Some cookbook links are still active |
| wtf.tw Michael Six Silberman reference archive | https://wtf.tw/ref/ | Someone posted this archive |