Normalize.css : A modern, HTML5-ready alternative to CSS resets
Normalize.css makes browsers render all elements more consistently and in line with modern standards. ...
darken : Easy control over your dark mode in a web environment
DD_belatedPNG : better PNG background-image support in IE6
css.gg : Minimalistic icon library Designed by code, Customizable & Retina-Ready icons — built 100% in pure CSS. Easy integration: Embed, NPM & API
98.css is a CSS library for building interfaces that look like Windows 98.
