Rapidly build modern websites without ever leaving your HTML. A utility-first CSS framework packed with classes like flex, pt-4, text-center and rotate-90 that can be composed to build any design, directly in your markup.

Stylemug is a fast css-in-js library that extracts atomic CSS rules to a .css file. It generates atomic CSS from the static stylesheets defined in JS. The compiled rules are extracted to a .css file.The stylesheet code in the Javascript bundle is replaced (no CSS in JS) with a hash map for classnames lookup at runtime.

Tachyon animate by Andrew Nater is a single purpose classes to help you orchestrate CSS animations.