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 190 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 35 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 25 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 23 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
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
Bourbon Bourbon - A simple and lightweight mixin library for Sass / CSS. Free Open Source Mac OS X Windows Linux Sass No features added Add a feature 11 Like
Purecss A set of small, responsive CSS modules that you can use in every web project. Free Open Source Web No features added 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
MUI MUI is a lightweight HTML/CSS/JS framework that follows Google's Material Design guidelines. Free Open Source Web Material design Responsive design Add a feature 6 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
Material Design Lite Google's front-end web framework for building sites to the Material Design specification. Free Open Source Web GitHub Responsive design Add a feature 3 Like
Blaze CSS Open source modular CSS framework providing great structure for building websites quickly. Free Open Source Mac OS X Windows Linux Self-Hosted No features added Add a feature 2 Like
