When you are building a website with a css framework like Bootstrap, you will only use a part of the framework and unused css styles will be included.
Purgecss removes unused selectors from your css, resulting in smaller files.
"With PurgeCSS, you'll have a hard time generating CSS that isn't under 10kb minified and gzipped." - Tailwindcss docs
lit is the world's smallest responsive CSS framework. It includes grids, cards, tables, typography, and more... all in under 400 bytes (minified and gzipped)
Unnamed is a colorful mini css framework
Read more about How & why I made it here: https://www.codementor.io/ismail16smakosh23/my-short-journey-building-unnamed-my-own-css-framework-csqi9o679