matcha.css | Drop-in semantic styling library in pure CSS
matcha.css is a pure CSS library designed to style HTML elements similarly to a default browser stylesheet, eliminating the need for users to manually patch their documents.
Mantine
React components and hooks library with native dark theme support and focus on usability, accessibility and developer experience
Primer Design System
The style guide is being deprecated! For CSS docs, please see: https://primer.style/css