Here are some good tools

These are some of the tools that I use often, some are self hosted some are not. They mostly have nothing in common and it's just a collection of ones that I like.

Pixel Circle Generator

An open-source pixel circle generator for Minecraft written in typescript by donatj.

Code Syntax Highlighter

A syntax highlighter than outputs styled HTML by Anton Shevchuk.

PNG to JPG Converter

Free online bulk PNG to JPG converter.

The Rust Book

Beginner resource for the Rust programming language.

Image Colour Picker

Online colour picker that allows you to upload an image and get hex and rgb colour values.

CSS Loaders

Resource for many loading animations in css.