- [The Internet Archive](https://archive.org/) - Audio, video and ebook library. Make an account and you can freely check out e-books as though it were a physical library.
- [Nexis newspaper database](https://www.lexisnexis.com/en-us/professional/nexis/nexis.page) - Searchable database of newspapers similar to the above-mentioned PressReader.
- [Chronicling America](https://chroniclingamerica.loc.gov/) - Library of Congress project that lets you search some historical American newspapers. By no means is it an archive of *all* historical newspaper content.
A list of various resources compiled or provided by the Wikipedia Library, which is a system aiming to help the site's editors gain better access to sources. Some of this requires you to be an active editor on the site to access, some of it doesn't.
- [Wikipedia Library Partners](https://wikipedialibrary.wmflabs.org/partners/) - Their main program, which provides access to partnered pay-walled content for active Wikipedia editors.
- [Find sources](https://en.wikipedia.org/wiki/Help:Find_sources) - 'Find sources', for finding sources in the first place. Useful for non-editors, too.
- [Find your source](https://en.wikipedia.org/wiki/Wikipedia:Find_your_source) - 'Find your source', for finding a source you already know about but can't access. Just a general advice page, much of it you don't need to be an editor to exploit.
- [Reference desk](https://en.wikipedia.org/wiki/Wikipedia:RD) - Wikipedia's reference desk. You don't need to be an active editor to ask questions here.
- [Find your library](https://en.wikipedia.org/wiki/Wikipedia:Find_your_library) - Some advice from WPL about finding a library with a source you are seeking (like a book).
- [Wikipedia Library Free Resources](https://en.wikipedia.org/wiki/Wikipedia:The_Wikipedia_Library/Free_resources) - Free resources list. Compilation of resources on a plethora of topics usable by non-editors.
- Related: [Rationalwiki's recommended sources](https://rationalwiki.org/wiki/RationalWiki:Websites) - A lot of this is shit. I still thought it was worth a mention since some of it isn't shit.
- [Google Talk to Books](https://books.google.com/talktobooks/) ([Related projects](https://research.google.com/semanticexperiences/)) - Enter natural language queries, get related books.
- [Google Programmable Wikipedia Search](https://en.wikipedia.org/wiki/User:Syced/Wikipedia_Reference_Search) - Search through sources considered "reliable" by Wikipedia editors.
- Improving your Google search effectiveness: [Video tutorial](https://www.youtube.com/watch?v=PPw4PSsi55A) and [article](https://www.lifehack.org/articles/technology/20-tips-use-google-search-efficiently.html).
- [SearX instances](https://searx.space/) - A list of SearX instances. SearX is a meta-search engine which allows you to search through various other search engines (Google, DuckDuckGo, Yandex, etc) at once while also avoiding being tracked by them. Popular instances of SearX might be blocked by Google et al because of their high traffic.
- [JSTOR](https://www.jstor.org/) - Academic search engine. By making an account, you can get access to up to 100 papers a month on there for free. You can also use the [analyze tool](https://www.jstor.org/analyze/) which analyzes PDFs for you and shows you a list of papers it thinks are related. Combine this with [Sci-Hub](#sci-hub) for maximum effectiveness.
The largest free library in history. There are multiple domains from which one can access it, some with slightly different user interfaces. Here are some:
- [gen.lib.rus.ec](https://gen.lib.rus.ec/)
- [libgen.rs](https://libgen.rs/)
- [libgen.is](https://libgen.is/)
- [libgen.gs](https://libgen.gs/)
- [libgen.lc](https://libgen.lc/)
- [libgen.fun](https://libgen.fun/)
If you have trouble accessing LibGen (perhaps known domains are down), try:
- [This page](https://libgen.onl/library-genesis/) which lists some mirrors and appears to be frequently updated.
### Z-Library
LibGen alternative, with a friendlier UI.
Criticized by some for getting most of its catalogue from LibGen, adding a few rare books over it without contributing back, and charging money for unlimited access.
- [z-lib.org](https://zlibrary.org)
- [b-ok.cc](https://b-ok.cc/)
### Sci-Hub
"Removing barriers in the way of science", Sci-Hub is a mirror/archive for academic and scientific literature. Using DOI codes or even JSTOR links one can find a good deal of papers available here.
- [sci-hub.se](https://sci-hub.se/) (main site)
- [sci-hub.st](https://sci-hub.st/)
- [Mirror list by /r/scihub subreddit](https://old.reddit.com/r/scihub/comments/jg8ka2/official_scihub_website_directory_scihub_project/)
- The project's social media: [Backup Twitter](https://twitter.com/Sci_Hub_tweets), [Facebook](https://www.facebook.com/sci.hub.org) and [VK](https://vk.com/sci_hub). Alexandra Elbakyan, the project's founder/maintainer, also has a [Twitter](https://twitter.com/ringo_ring) and a [blog](https://engineuring.wordpress.com/).
- [/marx/](http://eregime.org/index.php?showforum=719) - Forum run by Ismail, notable for reasons explained [here](https://archive.today/cDhZe). Ismail is a competent reference desk operator, especially for topics directly concerning Marxism. Note, as mentioned the /meta/ thread, that: the site doesn't currently have a standard HTTPS related certificate. This means that you should assume anything that you post on that website is exposed. This includes passwords used to register to the site. This remains true until the site gets such a certificate. If you register, use a password you have never used and never will use anywhere else. You can post pseudo-anonymously as a "guest" if you prefer that.