HTML & CSS Libraries

Customize theme for shadcn/ui with tweakcn's interactive editor. Supports Tailwind CSS v4, Shadcn UI, and custom styles. Modify properties, preview changes, and get the code in real time.

A declarative, HTML‑based language that makes building web apps fun. Marko is HTML re‑imagined as a language for building dynamic and reactive user interfaces.

Get started with an open-source library of over 600+ UI components, sections, and pages built with the utility classes from Tailwind CSS and designed in Figma.

A set of beautifully designed components that you can customize, extend, and build on. Start here then make it your own. Open Source. Open Code.

Tailwind CSS Components Library. Examples, Tailwind themes and Tailwind blocks for fast UI development

Shoelace provides a collection of professionally designed, every day UI components built on a framework-agnostic technology.

Materialize is a modern responsive CSS framework based on Material Design by Google.

Bourbon is a library of pure Sass mixins and functions that are designed to make you a more efficient style sheet author.

A design element gallery for web designers and web developers. Find snippets using HTML, CSS, Javascript, jQuery, and Bootstrap.

Free themes for Bootstrap.