- Bootstrap - the most popular HTML, CSS, and JS library in the world;
- BULMA - free, open source CSS framework;
- UIkit - lightweight and modular front-end framework;
- Semantic UI - user Interface is the language of the web;
- Materialize - modern responsive front-end framework;
- Pure CSS - set of small, responsive CSS modules;
- Foundation - the most advanced responsive front-end framework;
- Skeleton - dead simple, responsive boilerplate;
- Material UI - react components for faster and easier web development;
- Material Design - design system, backed by open-source code;
- Ant Design - design system for enterprise-level products;
- Tailwind UI - beautiful UI components;
- Chakra UI - build accessible React apps & websites with speed;
- Clarity Design System - UX guidelines, HTML/CSS framework and etc;
- Reactstrap - easy to use React Bootstrap 4 components;