Gridlex

Simple. Robust. Responsive. Flexible.

BareCSS

A classless CSS framework

Open source modular CSS framework providing great structure for building websites quickly

Simple and flexible HTML, CSS, and JS for popular UI components and interactions

Bourbon - A simple and lightweight mixin library for Sass / CSS.

Bulma is an open source CSS framework based on Flexbox and built with Sass. It’s 100% responsive, fully modular, and available for free.

Element, a Vue 2.0 based component library for developers, designers and product managers.

The most advanced responsive front-end framework in the world

A rock-solid default for HTML5 awesome.

MUI is a lightweight HTML/CSS/JS framework that follows Google’s Material Design guidelines

Cross-platform Material component library for React

A CSS Framework and a Set of React Components that Implement Google’s Material Design

Metro UI CSS a set of styles to create a site with an interface similar to Windows 8.

A set of small, responsive CSS modules that you can use in every web project.

The Freshest CSS Framework

A UI Component library implemented using a set of specifications designed around natural language

Spectre is a web application to diff screenshots.

A lightweight and modular front-end framework for developing fast and powerful web interfaces

Google’s Material Design UI Components built with accessibility in mind, Sass, And React.

Yeti provides software development and design services.