Open source. Open possibilities.

React Native is a framework for building native Android and iOS apps with React. JavaScript code renders to native platform UI, with Fast Refresh, native modules and access to a large ecosystem of community libraries.

ping6.it is a web UI for comparing IPv4 vs IPv6 latency and reachability using Globalping and RIPE Atlas probes. It runs ping, traceroute, DNS, and HTTP measurements on the same probes for fair side-by-side comparison.

A curated collection of 500 React interview questions and answers covering core concepts, hooks, Redux, routing, testing and more, aimed at helping developers prepare for React job interviews.

Marigold is a React implementation of the Marigold Design System, built on react-aria and Tailwind CSS. The monorepo ships component and theme packages, a Storybook workspace, a Next.js documentation site, Vitest tests and CI-driven releases via Changesets.

react-app-rewired lets you customize Create React App's webpack, Jest, and dev server configurations without ejecting, preserving CRA's benefits while adding flexibility for plugins, loaders, and custom build rules.

Liferay AI Commerce Accelerator (AICA) is a suite of client extensions that uses generative AI to rapidly generate and deploy commerce data—catalogs, accounts, orders—into Liferay DXP. It offers a zero-dependency CLI, real-time monitoring, dependency-aware generation, and provider-agnostic AI support (OpenAI, Gemini, Claude).

Cloudx is a local-first mobile and desktop workbench for running and supervising Codex CLI sessions on your own Linux machine: pane layouts, file tools, diffs, worktrees, plugin tabs, a local documentation archive, Jira views and constrained voice control.

Material UI is an MIT-licensed React component library offering an independent implementation of Google's Material Design system, maintained by MUI with over a decade of open-source development and a wide set of reusable UI components.

Design Oracle analyzes a website with Playwright and extracts its design system—colors, typography, spacing, components and UX patterns—then exports Tailwind v4 config, React JSX, JSON design tokens or a DESIGN.md report. It runs standalone or as an MCP server for AI agents.

Saas UI is a design system and source component registry for SaaS products built on Chakra UI. It provides a Chakra preset, CLI-installed editable components, hooks, forms, auth and modal packages, plus docs, Storybook and examples.

BGSTM is a methodology-agnostic software testing framework built on six core phases, from test planning to results reporting. It ships guidance, templates, worked examples, and a self-hostable FastAPI + React reference application with traceability and quality dashboards.

Pixel Art to CSS is a React-based online editor for drawing and animating pixel art, then generating CSS using box-shadow and keyframes. It supports palette customization, animation settings, project save/load, and export to static image, animated GIF, or sprite image.

coss.com/ui is the official design system of Cal.com — a TypeScript monorepo of React components built on Base UI and styled with Tailwind CSS, intended to be copied, pasted and owned, alongside the docs site and a legacy Origin UI snapshot.

An unofficial, open-source Codex-first Agent Skills library with 80 curated skills for premium frontend, website, motion, accessibility, QA, and reliable agent workflows. Includes adapters for Claude Code, Cursor, and Gemini CLI, plus benchmarks and examples.

A modern, open-source animation library for JavaScript, React, and Vue, featuring GPU-accelerated performance and a simple API.

Zustand is a small, fast React state management library using hooks. It provides a simple, unopinionated API for managing application state without boilerplate or context providers.

Free MIT-licensed React admin and dashboard template built on React 19, CoreUI React components and Vite, with AI-assistant context files (.cursorrules, ARCHITECTURE.md, DEVELOPMENT.md) and a ready-made layout, routing and sidebar skeleton.

Official Keybase client repository containing the Go core crypto libraries, service, CLI, and cross-platform apps for macOS, Windows, Linux, iOS, and Android built with React Native and Electron, plus packaging and Avro protocol definitions.

Taro is an open cross-platform and cross-framework solution that supports writing one set of code with frameworks like React/Vue/Nerv, and compiling it to run on WeChat, JD, Baidu, Alipay, ByteDance, QQ mini-programs, as well as H5, React Native, and other multi-platform applications.

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.