

Chota - A responsive, customizable micro-framework (3kb) with helpful utilities and a grid system.Charts.css - CSS data visualization framework.Butter Cake - A Modern Lightweight Front End CSS framework for faster and easier web development.Bulma - A modern CSS framework based on Flexbox.Bootstrap - The most popular HTML, CSS, and JS framework.Bonsai - A complete Utility First CSS Framework for less than 50kb.Awsm.css - Simple CSS library for semantic HTML markup.AgnosticUI - Accessible CSS component primitives that also work with React, Vue 3, Svelte, and Angular.

Stylus - Expressive, robust, feature-rich CSS language built for NodeJs.STYLIS - Light-weight CSS preprocessor.Sass - Mature, stable, and powerful professional-grade CSS extension language.PostCSS - Transforming CSS with JS plugins.LESS - Backwards compatible with CSS, and the extra features it adds use existing CSS syntax.Stylecow - Modern CSS for all browsers.Rework - Plugin framework for CSS preprocessing in Node.js.PostCSS - Transforming styles with JS plugins.Gonzales PE - CSS parser with support for preprocessors.CSSTree - Detailed CSS parser with syntax validator.CSSOM - CSS Object Model implemented in pure JavaScript.W3c/css-houdini-drafts - Mirror of Houdini WG Editor repository.W3c/csswg-drafts - Mirror of CSS WG Editor Draft repository.If you would like to learn more, visit CSS Working Group Page. These specifications are assigned maturity levels as they move through the design process. The CSS Working Group creates and defines CSS specifications. CSS Development at Large-Scale Websites.
