Tailwind CSS

Tailwind CSS is a utility-first CSS framework that lets developers build custom designs directly in their markup. Instead of predefined components, it provides low-level utility classes for spacing, color, typography, and layout.

Developers favor Tailwind for its speed and flexibility: designs come together quickly without leaving HTML, and the framework's configuration system keeps large codebases consistent. It is free and open source, with a paid UI component library available separately.