Sites and apps similar to Responsive Grid System include Bootstrap, which is free and open source. Other options are Tailwind CSS, Bulma, Semantic UI and Foundation. You're spoiled for choice with CSS Frameworks like Responsive Grid System: we list more than 50 alternatives for self-hosting, Mac, Windows, Linux and Android.
A unified, HTML5-based user interface system for all popular mobile device platforms, built on the rock-solid jQuery and jQuery UI foundation. Its lightweight code is built with progressive enhancement, and has a flexible, easily themeable design.
United States
Front-end framework with a built-in dark mode and full customizability using CSS variables; great for building dashboards and tools.
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 from the PhoneGap app developer community.
Eva Design System is a free and open-source, customizable design system. Available for Sketch with Mobile and Web component libraries.
United States
Spectre.css is a lightweight, responsive and modern CSS framework for faster and extensible development.
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 submodules.
France
EU
Mobile Angular UI is a mobile UI framework just like Sencha Touch or jQuery Mobile. If you know Angular JS and Twitter Bootstrap you already know it!
Little Widgets is a collection of beautifully designed HTML website widgets and popups. It’s coded, responsive, animated and ready to use on your website.
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.
HTML KickStart is a ultra–lean set of HTML5, CSS, and jQuery (javascript) files, layouts, and elements designed to give you a headstart and save you a lot of hours on your next web project.
Russia
Denmark
