Clothes and other fashion-related things!

Somnia Romantica: Dreamy Romantic Goth. I'm a huge fan of her one-of-a-kind pieces, and she's planning to do tutorials and patterns in early 2025.
Agashi by Christina O: Goth Lingerie, with plenty of bats (also Sailor Moon). Her shop is pretty empty at the moment while she catches up on orders, but her instagram and youtube have plenty of tutorials as well.
Morgan Donner: Historical inspired tutorials. I've linked to my favourite video of hers, which combines the aesthetic of Tripp pants with late Victorian split skirts.
Bene's Addict: I don't speak a lick of french, but I've been bumbling along relatively fine with this site. The Lingerie Addict: No longer updating, but functioning as an archive these days. Also, Cora Harrington has a book out which you can find through the navbar of the blog.
The Underpinnings Museum: Run by Karolina Laskowska, it has a wealth of information on undergarments through the ages. It even has a few patterns drafted from garments in the collection available.

Books!

The Darkangel Trilogy, by Meredith Ann Pierce: Hard to track down, but very worth it. A combination of high fantasy and sci-fi.
Derin Edala: lots of short stories and the occasional longer serial. Everything I've read so far is sci-fi, with the occasional more metaphorical premise. The Void Princess is very, very good.
Cate Kennedy: An Australian author, I discovered her books when we were assigned her anthology Like A House On Fire in class. Her stories tend towards the bleak, but they stick with you.
Anne Ridler: My favourite poet. Again, entirely out of print and hard to track down, but if you can, read A Matter of Life and Death. Currently only available for hour borrows on the internet archive, but I have a copy that I'll try to transcribe passages out of when I get the time. I'm doing my best to track down a copy of her play Cain as well.
Mana by Vin Lee: My favourite manhwa. Sort of like if ghost-busters was about a goth college student instead of four middle-aged men. Scanlations are relatively easy to find as it hasn't been officially translated.
Girl Genius by Phil and Kaja Foglio: A comic that's been running in print since 2002 (I think) and on the web since 2005, updating monday-wednesday-friday. It follows the story of Agatha Heterodyne in a world full of mad scientists and all that entails.

Fonts!

Apostrophic Labs: Lots of cool freeware fonts. Distro is one of my favourites, but there's plenty of variety here too. You can read more about the history of the foundry here.
Blambot: Run by Nate Piekos, long-time comic letterer. I've linked to fonts available for free through an indie license, which you can read more about through the site.
Dieter Steffmann: My favourite source for blackletter fonts when I don't want to write it out by hand. All his fonts are completely free.

Software!

Paint.net: My favourite program for super simple graphic editing. It's like a slightly more complex Microsoft Paint. I've been using it since 2010.
Libresprite: A free version of Aseprite, it's designed for making pixel sprites and tiling textures. Supports animation.
Electric Zine Maker: This is sort of like kidpix, but for making zines.
SmartEdit Writer: Currently my favourite writing software. Sort of like what I think scrivener is like, only it's local software and not cloud-based. Side note: I've never actually used scrivener to compare the two.
Libreoffice Writer: Also part of my writing process. I like to read through completed chapters in this after exporting from SmartEdit for a final edit. I also use Libreoffice Draw for making/editing PDFs.
Calibre: An eBook library program. You can also find plugins to remove DRM from your books using Calibre. This is the one I use.