Kelp is a lightweight UI library designed for HTML enthusiasts, utilizing modern CSS and Web Components without requiring a build step. It offers customizable features through CSS variables and aims to enhance web development by providing semantic utility and component classes. The library is currently in active development, and users can sign up for notifications on new features and releases.

The site provides an overview of building web applications and websites using only HTML, CSS, and JavaScript, without relying on frameworks or build tools. It covers topics such as Web Components, modern CSS, and creating single-page applications, emphasizing the long-term benefits of a simpler, low-maintenance approach to web development. This resource is intended for those already familiar with web technologies.