Selectize is the hybrid of a textbox and <select> box. It's jQuery based, and it has autocomplete and native-feeling keyboard navigation; useful for tagging, contact lists, etc.

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

Official Sass port of Bootstrap 2 and 3.

💳 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.

A simple, beautiful Jekyll theme that's mobile first

The Digital Services Playbook

responsive flexbox grid with inline-block legacy support

Styling HTML as if it were raw Markdown text.

Flexible, fluid and fun CSS framework.

GitHub Pages Theme: Leap Day

The League of Extraordinary Packages website