Bootstrap Bootstrap is a open-source collection of tools for creating browser sites and applications. It contains HTML and CSS-based design templates for typography, forms... Free Open Source Self-Hosted HTML5 Boilerplate JavaScript Responsive design Add a feature 192 Like
Semantic UI Semantic empowers designers and developers by creating a shared vocabulary for UI. Free Open Source Web No features added Add a feature 36 Like
Foundation Foundation is an easy to use, powerful, and flexible framework for building rapid prototypes and production code on any kind of device. Free Open Source Web No features added Add a feature 41 Like
Bulma A modern CSS framework based on Flexbox. Free Open Source Web Self-Hosted Responsive design HTML5 Support Lightweight Mobile friendly Add a feature 24 Like
Materialize Materialize is a modern responsive CSS framework based on Material Design by Google Free Open Source Web Material design Responsive design Add a feature 26 Like
UIKit A lightweight and modular front-end framework for developing fast and powerful web interfaces. ui framework full HTML / CSS, javascript component , form, theme ... Free Open Source Web No features added Add a feature 27 Like
Skeleton 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... Free Open Source Web No features added Add a feature 20 Like
jQuery UI jQuery UI is an open source library of interface components — interactions, full-featured widgets, and animation effects — based on the stellar jQuery javascript library... Free Open Source Web No features added Add a feature 27 Like
Metro UI CSS Metro UI CSS a set of styles to create a site with an interface similar to Windows 8. Free Open Source Web LESS jQuery Responsive design Add a feature 11 Like
Spectre.css Lightweight, responsive and modern CSS framework for faster and extensible development. Free Open Source Web Self-Hosted Responsive design Add a feature 5 Like
Gridlex Simple. Robust. Responsive. Flexible. Based on Flexbox (CSS Flexible Box Layout Module), Gridlex is a very simple css grid system to quickly create modern layouts and... Free Open Source Web Self-Hosted Responsive design Add a feature 6 Like
Topcoat 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... Free Open Source Mac OS X Windows Linux Web Support for Themes Add a feature 3 Like
GroundworkCSS GroundworkCSS is a 100% free and open source responsive HTML5, CSS and JavaScript Framework. Free Open Source Web Self-Hosted No features added Add a feature 6 Like
metro-bootstrap Simple bootstrap from Twitter with Metro style. Free Open Source Web Bootstrap Responsive design Add a feature 6 Like
w2ui W2UI is a small JavaScript UI library with a complete set of widgets: layout, grid, sidebar, toolbar, tabs, fields, popup, utilities. Free Open Source Mac OS X Windows Linux Autocompletion Add a feature 12 Like
