Open source. Open possibilities.

Franken UI (franken-ui/ui) is described as an HTML-first UI component library built on UIkit 3, extended with LitElement and inspired by shadcn/ui. Its README now only announces a move to 0build, so documentation lives elsewhere.

Headless UI offers completely unstyled, fully accessible UI components for React and Vue, designed to integrate with Tailwind CSS. Packages include @headlessui/react, @headlessui/vue, and @headlessui/tailwindcss. Full documentation at headlessui.com.

Magic UI is an open-source UI library providing animated components and effects designed for design engineers to copy and paste into their applications.

Tailgrids is an open-source React UI component library built with Tailwind CSS, offering 100+ production-ready copy-paste components plus UI blocks and templates, with TypeScript support, accessibility, dark mode and a CLI installer.

TW Elements is an MIT-licensed component library for Tailwind CSS, offering 500+ interactive UI components and 117+ design blocks with dark mode support, theming options, and quick installation for personal and commercial use.

Lightswind UI is an English-documented React component library distributed as source code via a CLI. It provides 160+ animated, accessible components and an MCP server for AI coding tools, with MIT-licensed core components and optional Pro content.

Cult UI is an MIT-licensed collection of accessible, customizable components styled with Tailwind CSS and compatible with shadcn. It emphasizes copy-and-paste integration and also bundles AI agent patterns, premium blocks, and starter templates.

Nuxt UI is a Vue and Nuxt component library built on Reka UI, Tailwind CSS and Tailwind Variants, offering accessible, themeable interface components plus official starter, landing, docs, SaaS, dashboard, chat and other templates under the MIT license.

Flowbite is an open-source UI component library built on Tailwind CSS, offering interactive components like modals, dropdowns and datepickers driven by data attributes, with vanilla JS APIs, TypeScript types, RTL support and bindings for React, Vue, Svelte and Angular.

Tremor offers 35+ customizable, accessible React components for building charts and dashboards. Built on Tailwind CSS and Radix UI, the components are designed for copy-and-paste use, with installation documentation and an Apache 2.0 license.

RetroUI is a retro-styled Tailwind CSS component library that provides NeoBrutalism-inspired UI elements for building bold, modern web applications.

Oruga is a lightweight Vue.js 3 UI component library with no CSS framework dependency. It provides customizable components, tree-shaking, themes, and class-mapping configuration for integrating Tailwind, Bulma, Bootstrap, or custom styles.

Welcome UI is the customizable design system open-sourced by Welcome to the Jungle (@wttj). Built with React, TypeScript, Tailwind CSS and Ariakit, it collects the core components needed to build a delightful web application, with detailed documentation in the library README.

A hand-drawn React component library with a sketchy notebook aesthetic: 20 TypeScript components, hand-drawn SVG borders, paper textures, per-component theme props for colors and typography, tree-shaking support, and a bundle the README reports as under 70 kB gzipped.

shadcn-svelte is a community-led Svelte port of shadcn/ui, providing accessible, customizable UI components that can be copied and pasted into Svelte apps to build custom component libraries.

shadcn/ui is an open-source collection of customizable, accessible UI components distributed through a code distribution platform, intended as a starting point for building your own component library and compatible with popular frameworks.

daisyUI is a free and open-source component library for Tailwind CSS. It offers pre-designed, customizable UI components that can be used directly in HTML. The project is popular and includes extensive documentation, a component gallery, and community support.

React Bits is an open-source library of 165+ animated, interactive React components for building visually striking websites. It includes text animations, backgrounds, UI elements, and free creative tools.

Tremor NPM offers 20+ open-source React components built on Tailwind CSS for building charts and dashboards, including area charts, cards and metric elements with light and dark theme styling.

Appica UI is an MIT-licensed monorepo of themeable UI components for modern web apps. It currently ships @appica/ui-react, offering 70+ accessible components with polished interactions, dark mode and full theming, plus a matching Figma design file.