Bulma

Bulma is a free, open-source CSS framework based on Flexbox. It provides a collection of pre-designed components and a responsive grid system, allowing developers to build modern and mobile-first web interfaces.

It is used for rapid prototyping and developing web applications with a consistent and clean design. Bulma is suitable for front-end developers and designers who prefer a CSS-only framework and want to streamline their workflow without relying on JavaScript.