randoma11y: Randomly Generates two-tone color themes with examples.
Hue.Tools: Generates color palletes.
SheCodes: Transform Generator (And other css tools)
html Cheat Sheets: Also includes JS Cheat Sheets and CSS Cheat Sheets.
The Matric Construction Set: Give your website some perspective.
FreeFrontEnd: Free Codes and Ideas to use for your website.
Scripted's Resources: Html and CSS script copy pastas.
SMALL PIXELS: As suggested, a collection of small pixel art, sorted by color.
GifCities: With the power of The WayBack Machine, search for retro gifs!
Pattern Monster: Generate custom patterns with simple shapes.
Doodad Dev: Custom Dithering for your images, Gradient tool, and custom pattern tool.
Dithertron: Another dithering tool.
Magic Pattern: Another very basic pattern generator.
Bonnibel's Gifs: A collection of decorative gifs.
PSP Player Tutorial: A tutorial made by monsieurdoll on how to make video players with devices.
FoolLovers: Distributor of site building graphics and CSS.
CodePen.io: CSS copy pastas made by the community.

Digital Art Adapt Kit: a Google doc teaching how to analyze styles and workflow.
Art Prompts: Randomly generated art prompts to practice with when you're feeling rusty or need ideas. (Not AI)

Nostalgia's Bin: They have a collection of japanese learning material, amoung other things.
FFXIV Resources: A collection of websites for FFXIV tools.
FFXIV Ready Check: Ready Checklist for FFXIV so you dont get caught slacking.
UmaRefs: Reference images for all your Uma needs.
DND Generators: Randomly Generate shops and other things for DND.

Useful Resources