Metro UI Alternatives

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

Open Source

A modern responsive front-end framework based on Material Design

Open Source

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

A utility-first CSS framework for rapidly building custom user interfaces.

Open Source

The most advanced responsive front-end framework in the world

Open Source

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

Open Source

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

Open Source

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

Open Source

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

Open Source

A Beautiful Boilerplate for Responsive, Mobile-Friendly Development

Open Source

Material Design Lite Components in HTML/CSS/JS

Open Source

Lightweight, responsive and modern CSS framework for faster and extensible development.

Open Source

BOOTFLAT is an open source Flat UI KIT based on Bootstrap CSS framework. And, for the designers, we offer a free PSD Download. It provides a faster, easier and less repetitive way for web developers or designers to create elegant web apps.

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

Open Source