jekyll/jekyll-admin

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.

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.

Strapi is a self-hosted headless CMS that auto-generates REST and GraphQL APIs from content model definitions you build visually with the Content-Type Builder — no code required on the API side. It ships with authentication, granular roles and permissions, a media library, i18n, and draft/publish workflows out of the box, and the request pipeline (Routes → Middlewares → Controllers → Services) is fully overridable at each layer. TypeScript is first-class and you can pair it with SQLite for local dev or PostgreSQL/MySQL/MariaDB in production. The plugin system and customizable admin panel are real extensibility points, not marketing. The tradeoff: there's no official Docker image (you roll your own from your project), and major version upgrades have been historically painful — the migration docs are thorough but the process still demands attention. Worth it if you need full control over your content infrastructure and don't mind owning the deployment; less ideal if you want something you can set and forget.