Files and directories

Archives

Project Gutenberg
Digital library of public domain works.

Library Genesis
The digital library for everything else.

Anna's Archive
A metasearch engine for Z-Library, Library Genesis, and Sci-Hub.

LibriVox
Free public domain audiobooks.

Murdercube
(Archived copy) Another file directory.

Search engines and link repositories

Peelopaalu Link Directory
A directory listing with an immense amount of interesting and obscure sites.

Cyberlife
Link aggregation for cyberpunk-related content.

Wiby
A search engine for the classic web.

Marginalia Search Engine
An independent search engine that focuses on non-commercial content.

Curlie
A large web directory curated by humans, not algorithms.

Million Short
A search engine that will remove the top 100-1000000 most popular sites from its results (in theory).

1MB Club / The 512KB Club / The 250KB Club / The no-JS Club / No CSS Club
Directories of sites under a megabyte / 512 / 256 kilobytes / that don't use Javascript / style sheets.

Piracy Index
A collection of digital piracy resources.

Torrents

[Magnet link] The All-Embracing Library
A massive 501 GB book collection organized by topics such as mathematics, physics, psychology, self improvement, survivalism, fiction, comics, magazines, conspiracy (beware!), etc. Also contains the author's meme collection, for some reason.

[Magnet link] VNanashi's Flash Collection / Addenda
Anon's personal Flash collection of over 6000 flashes, with sources and info.