Twitter Bootstrap is a free collection of tools for creating websites and web applications.
Foundation is an easy to use, powerful, and flexible framework for building rapid prototypes and production code on any kind of device.
A rock-solid default for HTML5 awesome. HTML5 Boilerplate is the professional badass's base HTML/CSS/JS template for a fast, robust and future-proof site. After more than three years in iterative...
Skeleton is a small collection of CSS & JS files that can help you rapidly develop sites that look beautiful at any size, be it a 17" laptop screen or an iPhone. Skeleton is built on three core...
Semantic empowers designers and developers by creating a shared vocabulary for UI.
Material design visual web framework
Metro UI CSS a set of styles to create a site with an interface similar to Windows 8 .
Simple bootstrap from Twitter with Metro style.
Flat UI Pro is made on the basis of Twitter Bootstrap in a stunning flat-style, and the kit also includes a PSD version for designers. Flat UI Pro contains a huge number of basic components, icons and glyphs.
A set of small, responsive CSS modules that you can use in every web project.
Refills are prepackaged patterns and components, built on top of Bourbon, Bitters and Neat.
The Goldilocks Approach to Responsive Web Design - A good starting point for design that takes device resolution out of the equation.
Responsable is a responsive HTML CSS LESS SCSS framework with clean markup, normalized CSS, and responsive images. It allows for nested columns for easy grid nesting and customization, and provides base styles...
MUI is a lightweight HTML/CSS/JS framework that follows Google's Material Design guidelines
Google's front-end web framework for building sites to the Material Design specification.
A grid system for responsive web design. Includes folding columns, elastic gutters, a zoomable baseline grid, and a delightful grid overlay script.
The ‘tiny screen first’ responsive boilerplate.
Welcome to Blueprint! This is a CSS framework designed to cut down on your CSS development time. It gives you a solid foundation to build your own CSS on. Here are some of the features BP provides...
Less Framework is a CSS grid system for designing adaptive websites. It contains 4 layouts and 3 sets of typography presets, all based on a single grid.
Topcoat is a brand new open source CSS library designed to help developers build web apps with an emphasis on speed. It evolved from the Adobe design language developed for Brackets, Edge Reflow, and feedback...
Sass data type validation library
Did you find any errors in the info about Bootstrap? Maybe you know an awesome alternative that’s not already listed? You can edit the info about Bootstrap and suggest new alternatives to it below.