Beautiful static documentation for your API

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

💳 make your credit card form better in one line of code

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

📫 SMTP Server + Web Interface for viewing and testing emails during development.

The Less Formal CSS Framework

A boilerplate for Sass projects using the 7-1 architecture pattern from Sass Guidelines.

Firefox’s Photon Design System.

Basic User Interface kit for Concise CSS