Open source. Open possibilities.

React Suite provides React UI components for building web applications. Supports major browsers and server-side rendering with Next.js. Includes installation via package managers and framework-specific guides.

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.

Magic UI is an open-source UI library providing animated components and effects designed for design engineers to copy and paste into their applications.

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.

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.

A free, browser-based database entity relationship diagram (ERD) editor and SQL generator.

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.

Sparkle is an experimental TypeScript playground monorepo using Turborepo and pnpm. It bundles a cross-platform design system, accessible React component library, Expo mobile app, WASM web shell with Zig executables, Storybook, and Astro Starlight docs.

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.

H5-Dooring is an open-source low-code editor for creating H5 landing pages and PC-oriented sites through drag-and-drop components, templates, forms, interactions, previews, and project/data management.

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.

Ant Design is an enterprise-class UI design language and React component library written in TypeScript, offering ready-to-use quality components, design resources, theming and internationalization.

Mirotone React is a component library for the Mirotone Design System, providing a set of React components and utilities to accelerate development for Miro.

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.

ImageCropKit is a privacy-first browser image cropper built with Next.js and the Canvas API. It handles single and bulk crops, aspect-ratio and platform presets, circle/oval shapes, and AI dataset sizes, exporting PNG, JPG, or WebP with no upload, signup, or watermark.

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.