Useful tools I found from Itch.
Procedural house creator. Their one-page dungeon generator has been useful for me in building my bases in Minecraft, but this also comes in handy for building general things that aren't bases.
If you ever wanted to know what software I used for some of the logos I've made for others; including my own, well...congratulations. You found that software.
I've used this tool for logos but I've also used it for everything but.
One single powerhouse of many different functions for grid-based art.
FX pack for Aseprite.
3rd-party plug-in for paintdotnet for making animations from a sprite sheet.
Vector creator/editor.
Normal map creator and visualizer.
Procedural dungeon creator. This is how most of the bases I've built in Minecraft were made. However, this tool doesn't make schematic files.
Free & open source ASCII editor.
Basically if photobashing and procedural generation had a child.
Great for making textures for all sorts of different things.