Open source. Open possibilities.

Braid is SEEK Group's themeable design system, distributed as a React component library. It provides themes, BraidProvider, and components styled with Vanilla Extract, with setup guidance for sku-based projects.

Priceline 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.

Helsinki Design System (HDS) is an open-source design system from the City of Helsinki, offering accessible React components, CSS styles and design tokens, alongside documentation and design resources.

CompoMo (@ds-mo/ui) is a framework-agnostic Stencil.js web component library styled with TokoMo design tokens, shipping generated Angular, React and Vue adapters alongside an MCP metadata server.

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.

Chakra UI is an open-source React component system for building accessible web apps and SaaS products quickly. It ships installable component packages, supports Next.js RSC, and is MIT licensed.

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.

Codex is the design system for Wikimedia, offering Vue 3 and CSS components, design tokens, icons, and a VitePress documentation site. It supports internationalization and meets WCAG 2.1 AA accessibility standards.

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.

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.

Carbon is IBM's open-source design system for products and experiences. This monorepo provides React and web component libraries, Sass styles, design tokens, icons, pictograms, and tooling for building consistent interfaces.

@alifd/next is Alibaba Fusion's configurable React component library for enterprise backend (mid/back-office) systems. It pairs with Fusion Design theme packages so designers and developers share one visual source, and supports npm or browser installs plus per-module imports.

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.

HeroUI Native is an Apache-2.0 React Native UI component library positioned as beautiful, fast, and modern. It provides documentation, a quick-start example app, and a preview app for exploring components and variants on device.

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.

A curated English-language collection of bookmarks, resources, articles, and tools about design systems for developers, covering design tools, design tokens, pattern libraries, component testing, books, and talks.

A Svelte component library implementing IBM's open source Carbon Design System, with 90+ accessible, fully typed components, five built-in themes, and companion icon, pictogram and chart packages.

Bezier React is a monorepo whose main package is a React component library implementing the Bezier design system, alongside icon, design token, codemod, Figma plugin and Stylelint packages.

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.

GlassKit is a dependency-free CSS component library with a glassmorphism look inspired by iOS 26 Liquid Glass: themes, design tokens, utility classes and a Constructable Stylesheet for Shadow DOM.