30+ More Free CSS Frameworks For Rapid Web Development

CSS frameworks are pre-prepared software frameworks that are meant to allow for easier, more standards-compliant web design using the Cascading Style Sheets language.Most of these frameworks contain responsive grid, buttons, forms and many more design elements. Some of the below CSS frameworks also come with more features and additional JavaScript based functions.

So here is the list of free CSS frameworks to make your web development process a lot easier.


Penguin is a lightweight and extensible front-end framework built with Sass for kickstarting any web project.
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Getting started with ApplePie is easy. Whether you are building a simple site with some ‘default’ UI, or you are a SASS master building a new app – this toolkit will help you get up and running!
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Primer is the basecoat of GitHub, made by nerds just like you who share a passion for HTML and CSS.
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Blackhole is a modular, flexible, minimalistic, but powerful SASS / CSS framework which focuses on semantics and preaches a write clear code way of getting things done.
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A lightweight front-end framework for creating scalable, responsive sites
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Gumby 2.6

Gumby 2 is built with the power of Sass. Sass is a powerful CSS preprocessor which allows us to develop Gumby itself with much more speed — and gives you new tools to quickly customize and build on top of the Gumby Framework.
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Andy is an open-source collection of useful SASS mixins.
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spaceBase is a boilerplate layer that can be built upon and tailored for your needs. It combines best practices for today’s responsive web with the core components we use on every project.
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Furtive is truly mobile-first and nearly all dimensions are done in rem. It also has a small footprint, cutting down on the bandwidth necessary for downloading CSS.
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Turret is a front-end styles and browser behaviour normalisation framework for rapid development of responsive and accessible websites.
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A minimal, pretty semantic, responsive CSS library
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Webknife is a web user interface framework for rapid design on the client side.
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A modern responsive front-end framework based on Material Design
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Bourbon Neat

Neat is a semantic grid framework built on top of Sass and Bourbon. It is simple enough to get you up and running in minutes, and powerful enough to handle any responsive layout you can dream of.
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Skyline is a starting point for building custom CSS frameworks. The starter kit provides a solid CSS architecture that acts as a scaffolding to support your unique design system. It promotes object-oriented CSS, written in SCSS using BEM notation.
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BOOTFLAT is an open source Flat UI KIT based on Bootstrap 3.3.0 CSS framework.It provides a faster, easier and less repetitive way for web developers or designers to create elegant web apps.
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A lightweight and modular front-end framework for developing fast and powerful web interfaces.
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Material UI

A CSS framework and a set of react components that Implement Google’s Material Design.
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Semantic UI

Semantic is a development framework that helps create beautiful, responsive layouts using human-friendly HTML.
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Kickstart has been used in production websites for over three years. Kickstart is a library, not a framework. This means you only use the CSS you need instead of slowing down your site with a complete UI library.
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One Nexus

A UI Framework Built in Sass.Coming with a responsive grid-system and set of UI elements, One Nexus can be used to build anything, from simple landing pages to multi-page web applications. With complete control at your finger tips, where you take it is up to you…
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A modular, front end framework to easily and quickly help you jumpstart your process in building complex interfaces for the web right out the box.
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Web Starter Kit

Web Starter Kit is an opinionated boilerplate for web development. Tools for building a great experience across many devices and performance oriented. Helping you to stay productive following the best practices outlined in Google’s Web Fundamentals. A solid starting point for both professionals and newcomers to the industry.
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A responsive html/css/less/scss framework.Built on CSS3 and HTML5 semantics to allow you to start capitalizing on a next generation standard.
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A responsive web framework
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IVORY Framework is 12 column fluid width grid. In general 12 column is dividable by 2, 3, 4, 6, 12 equal parts but our framework can also be dividable by 5 and 8 equal parts also
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Simple and flexible web framework to create elegant and modern web applications with the same look & feel of Windows 8
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Kube is one of the world’s most advanced and flexible frameworks.Kube helps you spend less time on routine tasks and more time creating amazing products.Focus on success, and Kube will cover the technology behind it.
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A super simple, responsive framework built for all devices big, small and in-between
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Metro UI CSS 3.0

Metro UI CSS developed with the advice of Microsoft to build the user interface and include: general styles, grid, layouts, typography, 20+ components, 300+ built-in icons. Metro UI CSS build with {LESS}. Metro UI CSS is open source and has MIT licensing model.
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Almost Flat UI

Almost Flat UI theme for Foundation Framework.
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