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A little curiosity. A world of open source.
THE FIRST COLLECTIONPrimer CSS is the CSS implementation of GitHub's Primer Design System, distributed as the @primer/css npm package. It provides Sass/SCSS source files with utility classes and component styles for core, product and marketing contexts. The project is now in maintenance (KTLO) mode.
Ionic is an open-source cross-platform app development toolkit for building native-quality iOS, Android, and Progressive Web Apps using JavaScript, HTML, and CSS, with native support for Angular, React, and Vue.
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.
Numl is a deprecated UI design language, web-component library and runtime CSS framework for quickly building interfaces that follow a design system, loadable with a single JavaScript module and no bundler or config.
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.
PrimeReact is a React UI component library now in maintenance mode: the repository receives security fixes only, active development has moved to PrimeUI, and all previously published MIT releases remain MIT permanently.
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.
Vuestic Admin is an open-source admin template suite built with Vue 3, Vite, Pinia and Tailwind CSS on top of the Vuestic UI component library, offering dark theme, i18n, accessibility and responsive layouts.
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.
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.
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.
PlayCanvas PCUI is an MIT-licensed UI component library for web tools, offering fully styled components, React wrappers, observer-based data binding, Storybook examples, font theming, and UMD bundle support.
Zag provides headless, framework-agnostic state machines for accessible JavaScript UI components, with adapters for React, Solid, Vue and Svelte and unstyled APIs for building your own design system.
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.
Gradio is an open-source Python library for quickly building and sharing web applications for machine learning models, APIs, or any Python function without requiring web development experience.
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.
Vuetify is an MIT-licensed Vue UI component framework offering handcrafted, responsive components with theming, SASS customization, Vite tree-shaking and 42+ language support.
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.
