Open source CSS frameworks

Bootstrap

Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web. (MIT)

Cross-platform

Bulma

Bulma is a modern CSS framework based on Flexbox. There is no JavaScript included. Bulma can be considered "environment agnostic": it's just the style layer on top of the logic. (MIT)

Cross-platform

Foundation

Foundation is a family of responsive front-end frameworks that make it easy to design beautiful responsive websites, apps and emails that look amazing on any device. (MIT)

Cross-platform

PatternFly

PatternFly is an open source design system created to enable consistency and usability across a wide range of applications and use cases. PatternFly provides clear standards, guidance, and tools that help designers and developers work together more efficiently and build better user experiences. (MIT)

Cross-platform

Tailwind

Tailwind is unapologetically modern, and takes advantage of all the latest and greatest CSS features to make the developer experience as enjoyable as possible. (MIT)

Cross-platform

5 applications