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A little curiosity. A world of open source.
THE FIRST COLLECTIONPriceline Design System is Priceline.com's open-source UI component library and design standard. It aims to unify interface patterns, speed design and development, and promote accessibility, internationalization, and responsive web design. It ships as the npm package pcln-design-system with Storybook docs and an MIT license.
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.
A Svelte 5 UI component library inspired by Vercel's Geist, aimed at helping developers build cohesive and consistent web experiences. It ships with an online documentation site and is released under the MIT license.
Recharts is an open-source chart library for React built on D3. It offers declarative, composable chart components rendered as native SVG with minimal dependencies, installable via npm, Deno or a UMD script tag, and documented with a storybook.
HeroUI, formerly NextUI, is a production-ready React component library combining React Aria accessibility with Tailwind CSS v4. It offers compound components, per-component packages, and AI-oriented tooling such as an MCP server, llms.txt, and agent skills.
Vant is a lightweight, customizable Vue UI component library for mobile web apps, offering 80+ components with zero third-party dependencies, TypeScript support, and compatibility with Vue 2/3, Nuxt, SSR, dark mode and i18n.
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.
MudBlazor is a Material Design component framework for Blazor, written entirely in C# with minimal JavaScript. It helps .NET developers build web apps quickly without wrestling with CSS, and offers documentation, examples and frequent releases.
Vuestic UI is an MIT-licensed Vue 3 component library from Epicmax, offering accessible UI components, documentation, Nuxt and Tailwind integrations, and a CLI scaffold command for quick project setup.
Cloudscape Design System's React component library, open-sourced by AWS. Provides accessible, ready-made UI components and global styles for building large-scale web applications, with documentation on the Cloudscape website.
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.
Ark UI is a headless, unstyled component library from the Chakra UI team, offering 45+ accessible UI primitives built on Zag.js state machines with the same API across React, Solid, Vue and Svelte.
nivo is an open-source React data visualization library built on d3. It offers customizable declarative chart components for SVG, HTML, and Canvas, with animations, theming, patterns, gradients, responsive layouts, server-side rendering, and an HTTP API.
Element is a Vue.js 2.0 UI toolkit for the web, distributed on npm as element-ui. It provides reusable interface components such as Select and Button, supports full or on-demand imports, custom themes, and works in modern browsers plus Internet Explorer 10 and above.
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.
Varlet is a Vue 3 component library based on Material Design 2 and 3, offering 70+ general-purpose components that work on both mobile and desktop, with theming, internationalization, SSR and TypeScript support.
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.
Arco Design Vue is a comprehensive Vue 3 UI component library built on the Arco Design system, offering over 60 ready-to-use TypeScript components, customizable theme tokens, and an npm package named @arco-design/web-vue.
