A collection of CSS3 powered hover effects to be applied to links, buttons, logos, SVG, featured images and so on. Easily apply to your own elements, modify or just use for inspiration. Available i…

Bootstrap 5 & Material Design UI KIT

Primer is GitHub's design system. This is the CSS implementation

Official Sass port of Bootstrap 2 and 3.

Material Design Web Components

Standards for developing consistent, flexible, and sustainable HTML and CSS.

The U.S. Web Design System helps the federal government build fast, accessible, mobile-friendly websites.

One tag One icon, no font or svg, Pure CSS

Pre-grid responsive layout toolkit for Sass, now deprecated

Extensible, scalable, Sass-based, OOCSS framework for large and long-lasting UI projects.

This is the Sass version of Normalize.css, a collection of HTML element and attribute rulesets to normalize styles across all browsers.

Flexible Grid System Scss Plus

Semantic Versioning spec and website

Accessibility (A11Y) Style Guide

onboarding, offboarding, or crossboarding made easy