libgen.is - Books and scientific papers, also mirrored by Anna's Archive.
sci-hub.st - You should know this by now. Free research paper resource.
textfiles.com - Wonderful archive of old texts on basically anything.
sapphic-cafe.neocities.org - Her link directory is great.
simpleliving.neocities.org - Strip life down to its necessities.
stallman.org - See "what's so bad about" pages.
cat-v.org - Unsuck your computer. Join the Plan9 cult.
digdeeper.club - Privacy essentials in a world of sureveillance.
cyberdeck.cafe - Build a cyberdeck!
ameliorated.io - Modify Windows to unsuck it.
omniglot.com - Encyclopedia of world languages.
lainzine.org - Cool stuff.
kolibrios.org - Super lightweight operating system.
antixlinux.com - Lightweight Linux distro.
distrochooser.de - Short quiz to help you pick a Linux distro.
cock.li - Mail provider.
MAS by Massgravel - Windows and Office activator script.
jspaint.app - MS Paint in your browser.
myabandonware.com - Retro software preservation.
/r/Piracy megathread - What it says on the tin.
myrient.erista.me - Huge retro game archive for numerous consoles.
slsknet.org - P2P music sharing network.
circuitbenders.co.uk - How to circuit bend instruments.
buildyourownclone.com - Build DIY guitar pedal clones.
diyhrt.wiki - Everything you need to know to start DIY hormones.
hrt.coffee - Market directory for feminizing hormones.
hrtcafe.net - Homebrew your own hormones.
For starters, sites I follow on Neocities are worth checking out.
everynoise.com - Music genre scatter plot with examples for every one.
radio.garden - Tune in to any radio.
A Constructive Look At TempleOS
