CSS-in-JS with build time generated styles, RSC compatible, multi-variant support, and best-in-class developer experience.

MUI is described as 'Lightweight HTML/CSS/JS framework that follows Google's Material Design guidelines' and is a CSS Framework in the development category. There are more than 50 alternatives to MUI, not only websites but also apps for a variety of platforms, including Self-Hosted, JavaScript, Tailwind CSS and Vue.js apps. The best MUI alternative is Bootstrap, which is both free and Open Source. Other great sites and apps similar to MUI are Tailwind CSS, Bulma, Foundation and UIkit.
CSS-in-JS with build time generated styles, RSC compatible, multi-variant support, and best-in-class developer experience.

A rock-solid default for HTML5 awesome. HTML5 Boilerplate is the professional badass's base HTML/CSS/JS template for a fast, robust and future-proof site.
Bacuri is a minimalist framework that uses Material Design concepts, and has a plugin system to enhance its capabilities.
A set of beautifully-designed, accessible components and a code distribution platform. Works with your favorite frameworks. Open source. Open code.

Front-end framework with a built-in dark mode and full customizability using CSS variables; great for building dashboards and tools.
Stylify is a library that generates utility-first CSS dynamically based on what you write. Write HTML. Get CSS 🚀.




EFY allows you to customize the design of your html based apps or websites from an UI sidebar menu and combine billions of possible patterns. You can also create, share or import json themes for easier access. All apps that use efy can share the same theme or individual themes.




Eva Design System is a free and open-source, customizable design system. Available for Sketch with Mobile and Web component libraries.

Spectre.css is a lightweight, responsive and modern CSS framework for faster and extensible development.
Little Widgets is a collection of beautifully designed HTML website widgets and popups. It’s coded, responsive, animated and ready to use on your website.



Simple. Robust. Responsive. Flexible.
Based on Flexbox (CSS Flexible Box Layout Module), Gridlex is a very simple css grid system to quickly create modern layouts and submodules.
