Tailwind CSS is a utility-first CSS framework that provides pre-defined classes for building responsive and customizable user interfaces.
Headless UI is a set of completely unstyled, fully accessible UI components for React, Vue, and Alpine.js that empower developers to build their own fully accessible custom UI components. Headless UI allows developers to focus on building accessible and highly functional user interfaces, without the need to worry about styling or layout.
A template or theme refers to a pre-designed layout or structure that provides a basic framework for building a specific type of application or website. It typically includes good design, placeholder content and functional features, allowing developers to customize and fill in the details according to their specific needs.