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

Kendo UI

Kendo UI is JQuery-based framework for rich UI, build HTML5 apps that look native on any device, build desktop and mobile applications for any browser.

Freemium Mac OS X Windows Linux Web

alloyui

AlloyUI is a framework built on top of YUI3 (JavaScript) that uses Bootstrap (HTML/CSS) to provide a simple API for building high scalable applications.

Free Open Source Web JavaScript

jKit

A very easy to use, cross platform, jQuery based UI toolkit, that's still small in size, has the features you need, and doesn't get in your way of doing things !...

Free Web jQuery

PrimeUI

PrimeUI is a collection of rich javascript widgets based on jQuery UI. PrimeUI is a spin-off from the popular JavaServer Faces Component Suite, PrimeFaces.

Free Open Source Web jQuery jQuery UI

Wee

Lightweight front-end framework for logically building complex, responsive web projects.

Free Open Source Web

1140 CSS Grid

A 1140px wide, 12 column grid. Fluid all the way down to a mobile version.

Free Open Source Web

Simple Grid

A simple, lightweight, responsive, 12-column grid and container system for your website.

Free Open Source Web Self-Hosted

Cascade Framework

Although the overall look and feel are most definitely inspired by Twitter Bootstrap, Cascade framework is not just another Bootstrap clone. Where Twitter Bootstrap puts...

Free Web

YAML CSS Framework

Yet Another Multicolumn Layout (YAML) is a modular CSS framework for truly flexible, accessible and responsive websites.

Free Web

Ninja UI

Ninja User Interface, the jQuery plugin for lethal interaction.

Free Open Source Web

Crow (column-row) grid framework

A smart grid framework, not just for grids.

Free Open Source Web Self-Hosted

Leaf (CSS Framework)

A CSS framework based on Google's material design.

Free Open Source Web Self-Hosted

Lite CSS

Lite CSS is a simple but also unique web framework. The term 'Lite' expresses the simplicity but also how light the project is! Lite CSS is responsive:...

Free Open Source Web

Material Design for Bootstrap 4

400+ material UI elements, 600+ material icons, 74 CSS animations, SASS files, templates, tutorials and many more. Free for personal and commercial use. Trusted by...

Freemium

Material-UI

A Set of React Components that Implement Google's Material Design.

Free Open Source Web Self-Hosted

Variable Grid System

The variable grid system is a quick way to generate an underlying CSS grid for your site. The CSS generated file is based on the 960 Grid System.

Free Web