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

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

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

  4. The most advanced responsive front-end framework in the world

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

  6. A modern responsive front-end framework based on Material Design

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

  8. A Beautiful Boilerplate for Responsive, Mobile-Friendly Development

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

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