Here are some good tools
These are some of the tools that I use often, some are self hosted some are not. There isn't much consistency, it's just a collection that I like.
Pixel Circle Generator
An open-source pixel circle generator for Minecraft written in typescript by donatj.
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Code Syntax Highlighter
A syntax highlighter than outputs styled HTML by Anton Shevchuk.
Image Colour Picker
Online colour picker that allows you to upload an image and get hex and rgb colour values.
