vasanthk/react-bits

freeCodeCamp is a free, self-paced curriculum for learning to code, published as open source at freeCodeCamp/freeCodeCamp. It's a 501(c)(3) nonprofit funded by donor support, structured around six certifications in its Full-Stack Developer Curriculum, each gated by required projects instead of open-book quizzes. The repository also carries beta language certifications for developers, interview-prep resources, and the code that runs the live freecodecamp.org platform.

Clean Code JavaScript is an open-source reference maintained by Ryan McDermott at ryanmcdermott/clean-code-javascript, adapting principles from Robert C. Martin's book Clean Code into JavaScript-specific "Bad" and "Good" code examples. It spans twelve chapters, from Variables and Functions through Classes, SOLID, Testing, Concurrency, and Error Handling, and is released under the MIT license.

Storybook is a frontend workshop maintained at storybookjs/storybook. It renders UI components and pages in isolation from your main application. Core renderers include React, Angular, Vue 3, Web Components, HTML, Ember, Svelte, and Preact, plus React Native and community support for Qwik and SolidJS. It's released under the MIT license.

Awesome React (enaqx/awesome-react) is a curated-list GitHub repository that catalogs frameworks, component libraries, state management tools, styling options, testing tools, and React Native packages for the React ecosystem. It also includes a Real Apps section pointing to production software built with React, plus a Contribution section explaining the project's history and rules.