Open source. Open possibilities.

ShipSwift is an AI-native SwiftUI component library offering production-ready animations, charts, UI components and multi-file modules, accessible to LLM coding assistants via MCP or local skills.

Base Web is a React component library implementing Uber's Base design system, offering modern, responsive UI components with TypeScript support and Styletron-based styling. Currently in maintenance mode.

Oat is an ultra-lightweight, zero-dependency semantic HTML/CSS/JS UI library (~10KB min+gz). It needs no framework or build step, styles semantic tags contextually without classes, and uses minimal JS WebComponents for dynamic parts.

UI Layouts is an open-source component library for building modern, creative web interfaces, offering ready-to-use blocks and effect components alongside setup notes for Tailwind CSS, Motion, clsx and tailwind-merge.

Radzen Blazor is a free, MIT-licensed UI component library for Blazor with 145+ native C# components, including DataGrid, Scheduler, Charts, forms and layout controls, plus 10 built-in themes with light and dark variants.

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.

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.

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.

Naive UI is a Vue 3 component library with over 90 tree-shakable components, written in TypeScript. It offers a type-safe theme system for customization without CSS imports, and data components use virtual lists by default for speed.

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.

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.

Radix Themes is an open-source React component library focused on fast development, easy maintenance and accessibility, maintained by WorkOS. The README points to full documentation, release notes, contributor guidelines, community channels and its MIT license.

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.

ZenUI Library React is an open-source UI component library built with React and Tailwind CSS. It offers 800+ components, 20+ templates, 100+ animated components, 500+ icons and color tools, and is used by copying code snippets into your project.

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 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.

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.

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.

Radix Primitives is an open-source, low-level UI component library for building accessible design systems and web apps, focused on accessibility, customization and developer experience. MIT-licensed, maintained by WorkOS.