PaulLeCam/react-leaflet

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.

Twenty positions itself as a developer-first CRM — one you'd treat like the rest of your codebase rather than a black-box SaaS tool you configure through a GUI. The monorepo ships a full TypeScript stack (NestJS backend, React frontend, PostgreSQL + Redis) and lets you define custom objects, fields, and views as code using their SDK, then publish them to a workspace via CLI. That tight loop between code and live CRM data is the actual differentiator: it's not a CRM with an API tacked on, it's a platform where the schema itself is versioned and shippable. The tradeoff is that you'll need someone comfortable with TypeScript and a self-hosted setup if you want to go beyond the cloud offering — it's built for teams that want to own their data model, not just configure dropdowns.

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.