Hexo is a static site generator built with Node.js that enables developers to create fast and efficient websites using Markdown, EJS, and Stylus. It offers features such as server-side rendering, plugin support, and easy deployment to hosting services like GitHub Pages and Netlify.

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.

ESLint is a linter for JavaScript that analyzes code to detect and report on potential problems and errors, as well as enforce consistent code style and best practices, helping developers to write cleaner, more maintainable code.