Arts & Crafts

PETSCII editor: Tool for making Commodore 64-era ASCII art
How Bogleech ships enamel pins as flats or letters
Lessons in Color Theory for Spyro the Dragon: This article singlehandedly taught me so much about like, everything ever. I feel like the best tutorial isn't a tutorial, but an examination of a pre-existing work.
Wind Waker Graphics Analysis: Articles analyzing the art of one of my favorite games.
The Ultimate Guide to Sonic Adventure DX Sins: A blog dedicated to comparing the graphics of Sonic Adventure to its inferior Gamecube port.

Reference

Animal Photo Art References Search: Rotate a 3D skull to get photos of animals from that angle. A must-have for furry artists.
Your Bike Photos: Photos of motorcycles. Not sure why I have this as I have never drawn a motorcycle in my life.

ConceptNet: Every time I'm looking for this I never find it. Fun and perplexing crowd-sourced thesaurus thingy. Absolutely look up your favorite animal and read what it's capable of.

While She Naps: I have Abby Glassenberg to thank for me getting into sewing. Her Elements of Soft Toy Design series is amazing.
How Is Soupy Formed: A unique-looking fursuit from start to finish. Taught me about EVA foam!
Giant Yoshi Plush: It's Giant Yoshi Plush. What more can I say?
Tutorials for Hand Embroidered Leaves & Flowers
Displaying Embroidery in a Hoop
Learn to Sew

TYPE CRIMES THAT WILL GET YOU SENT TO THE “WEEKEND HOBBYIST” JAIL: But I'm a weekend hobbyist!
Fonts In Use: An independent archive of typography.
Typeset in the Future: Studies of typography in sci-fi movies.
The Nickelodeon brand: Development of the Nickelodeon logo.
ACT SELECT: Recreated Sega fonts. Not for professional use, but cool to study.
BETTER LETTERER: Comic Lettering Tips

Glitch Text by Fabio: (not CC0, but cool to study)
Germs' BBCode School: Comprehensive guide to BBCode, mostly Flight Rising-specific but a lot of these apply to other sites too.

Peer2Peer.Live: Discovery tool for marginalized Twitch streamers. I'm on here!
Music for Streaming, Broadcasting, and Content Creation: Music you can use without getting killed by Twitch or YouTube. Not all of it is free.

Tartube: Offline downloader. My current favorite.
YTMP3: Offline downloader.
Offliberty: Offline downloader. Not sure if it still works, but I'm preserving it, especially since I used to use it daily.
SpotX: Spotify ad-blocker.