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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 comprehensive collection of over 6,100 free, MIT-licensed high-quality SVG icons designed on a 24x24 grid for web projects.
Next.js is Vercel's open-source React framework for building full-stack web applications. It extends the latest React features and integrates Rust-based JavaScript tooling for fast builds, and is used by some of the world's largest companies.
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.
Preact is a lightweight JavaScript library for building user interfaces, offering a React-compatible API with components and a virtual DOM in a very small bundle.
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.
Skeleton is an adaptive design system built on Tailwind CSS. It provides turnkey components for popular web frameworks, along with documentation, a theme generator, and community channels.
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.
Astro is a website build tool for the modern web, focused on content-driven sites and combining developer experience with lightweight output. It offers official integrations for React, Vue, Svelte, MDX, SSR adapters, and language tooling.
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.
