realtimecolors.com

Live testing color palettes and fonts for web design. Made by a designer who's really great, she runs a YouTube channel and made the site for free use by anyone.

If you like to play chess, check out www.lichess.org

It's free and open source, and it's very easy to find a game there, no matter what level you play.

It doesn't display annoying ads.

https://neal.fun

A variety of neat activities and educational pages.

https://html5zombo.com

zoo.replicate.dev - a bunch of free ai image generation models

snowfl - a search engine for torrents

Gayhomophobe.com it counts the time since the last openly homophobic figure was caught in a gay sex scandal

https://hackertyper.com/

I've actually seen this used in movies and TV shows.

www.5minute.games

It's a list of all the good word games, minigames and puzzles on the internet, and you can customize it to shortlist your favorites and even add new links. I go there every day to link to all my favorites.

...oh, full disclosure: I built it. Though hopefully nobody minds, since there's no ads or monetization whatsoever.

Ian's Shoelace Site:
Different ways to lace your shoes.

The Phrontistery:
Glossaries of, e.g., obscure words, lost words, etc.

https://everynoise.com

Every music genre you can think of, and then some. I finally found out what the stuff I like is called.

http://wiby.me/ is a cool site. It's a search engine that only has web 1.0 and web 1.0-styled websites.

userinyerface.com

Something that far too many managers and developers need to see, so they can better understand why their decisions and work completely sucks.

There is this really cool place called Lemmy, I'm sure many people here have heard of it but not anyone I ask in other places. It's like Reddit, it's a forum-esque place where people can exchange their thoughts. The people are a little biased on the extreme Marxist side of things, but overall it's pretty nice.

There is a - pretty dead - community, but maybe some of you could revive it: !coolwebsites@lemmy.ca

I needed Unicode symbols for a story I'm working on. (I want to use them as "magic runes" so I could type them into a document, but without using the standard "runes" that are typically used.)

Shape Catcher let me draw what I was looking for and then get a list of Unicode characters that matched that drawing. It's not exact so if there's no perfect Unicode match, it will give you ones that are close. This actually turned out to my benefit as I found shapes I hadn't considered but which worked nicely for my uses.

I might’ve came across it from a post here on Lemmy, but this website is great for music discovery. It lets you listen to music by decade and country via a neat map UI.

https://radiooooo.com/

https://chickenonaraft.com/

As the name suggests, you hang out with a chicken on a raft

mynoise.net .

I use it for background when I need to concentrate.

Library of Babel

Photoshop in your browser for free: https://www.photopea.com/

The website for the Heaven's Gate suicide cult is still up, 27 years after they all killed themselves.

https://www.heavensgate.com/

http://endless.horse

The only sad thing is it doesn't support https :(

https://loopsofzen.uk

If it doesn't work, you don't have working ipv6.

https://ciechanow.ski/

website that simulates fluids

https://zombo.com/

lemmy.world

https://www.nonograms.org/

Very entertaining.

Foldnfly.com - shows dozens of ways to fold paper airplanes.

www.thetruesize.com - Find the true size of one country compared to another.

https://noclip.website/

Basically a model viewer/freecam for stages from various video games. Really neat to see the tricks various devs pull to conserve detail.

http://acid1.acidtests.org/

https://www.webstandards.org/files/acid2/test.html

http://acid3.acidtests.org/

These websites were made to test out if your installed web browser is compliant with the worldwide web standards. It’s pretty neat stuff

https://earth.nullschool.net/ realtime global wind, pressure, temp, etc.

What.cd

Move along...

Last.fm and tracking your music listening. I've seen a post here but no one I see irl seems to know about it

https://ytmnd.com