A CSS framework is a software framework created to allow for easier, more standards-compliant web design using HTML/CSS. Many popular CSS frameworks are design-oriented and contain elements that can be re-used in the creation of any website or app, as well as a grid system designed to provide a responsive CSS layout to webpages.
All the frameworks listed in this article are free and open source.
Bootstrap is a powerful front-end framework for faster and easier web development. It includes HTML and CSS based design templates for creating common user interface components like forms, buttons, navigations, dropdowns, alerts, modals, tabs, accordions, carousels, tooltips, and so on.
Bootstrap gives you ability to create flexible and responsive web layouts with much less efforts.
Bootstrap was originally created by a designer and a developer at Twitter in mid-2010. Before being an open-sourced framework, Bootstrap was known as Twitter Blueprint.
You can save a lot of time and effort with Bootstrap. So bookmark this website and continue on.
Info & download https://getbootstrap.com/
Writing CSS can be really difficult. Period. And I get it – it can be frustrating to nail down your own ideas or the designs you get from your design team.
Tailwind CSS is basically a utility-first CSS framework for rapidly building custom user interfaces. It is a highly customizable, low-level CSS framework that gives you all of the building blocks you need to build bespoke designs without any annoying opinionated styles you have to fight to override. The beauty of this thing called tailwind is it doesn’t impose design specification or how your site should look like, you simply bring tiny components together to construct a user interface that is unique. What Tailwind simply does is take a ‘raw’ CSS file, processes this CSS file over a configuration file, and produces an output.
Info & download: https://tailwindcss.com/
A modern responsive front-end framework based on Material Design.
Material Design is a design language created in 2014 by Google. It uses more grid-based layouts, responsive animations and transitions, padding, and depth effects such as lighting and shadows.
As of 2019, Material Design has been implemented on most Google products as such as YouTube, Gmail, Google Drive, and Google Docs.
Materialize is a modern responsive front-end framework based on Material Design. Easy to use, it provides components, as well as starter templates which allow you to start designing your website with minimal setup time.
Info & download: https://materializecss.com/
A set of small, responsive CSS modules that you can use in every web project.
Pure is ridiculously tiny. The entire set of modules clocks in at 3.7KB* minified and zipped. Crafted with mobile devices in mind, it was important to us to keep our file sizes small, and every line of CSS was carefully considered. If you decide to only use a subset of these modules, you’ll save even more bytes.
Info & download: https://purecss.io/
Bulma is a free, open source framework that provides ready-to-use frontend components that you can easily combine to build responsive web interfaces.
With 21kB minified and gzipped, Bulma isn’t the most lightweight of this list, but this open source CSS framework is so interesting that it totally deserves a mention. Bulma is built with a mobile-first approach, which makes every element optimized for vertical reading, and its grid system is fully built with Flexbox.
Info & download: https://bulma.io/
UIkit is a lightweight and responsive CSS framework for developing fast and powerful web interfaces.
Info & download: https://getuikit.com/
Tired of boring, plain HTML and forever long CSS? Meet Skeleton, the perfect, lightweight, CSS addition to the rest of the boilerplate code you already include as a starting point of any project.
Most front-end styling libraries or frameworks operate by setting styles on classes that require the user to remember class names to add style to HTML elements. Skeleton works by applying the majority of styling directly to HTML tags. Tables, Forms, Lists, Buttons, you name it, they style it.
Info & download: http://getskeleton.com/