Stars
Skeleton: A Dead Simple, Responsive Boilerplate for Mobile-Friendly Development
Automatically add a progress bar to your site.
An easy-to-read, quick reference for PHP best practices, accepted coding standards, and links to authoritative tutorials around the Web
List of awesome CSS frameworks in 2025
A CSS only tooltip library for your lovely websites.
A modern dialog library which is highly configurable and easy to style. #hubspot-open-source
The 960 Grid System is an effort to streamline web development workflow.
A simple set of best practices to get HTML5 projects off on the right foot.
StyleStats is a library to collect CSS statistics.
RTLCSS / bootstrap
Forked from twbs/bootstrapThe most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web. (RTL)
Lazy load your images without the overhead of a library. IE7+, FF, Chrome.
An intuitive, lightweight carousel solution. No coding required.
Makes supporting CSS for left-to-right (LTR) and right-to-left (RTL) easy with Sass.