freeCodeCamp
freeCodeCamp.org's open-source codebase and curriculum
...It features interactive coding challenges, real-world projects, and guided progress through topic modules, culminating in certificates for completed tracks. A key aspect is that students contribute to open-source projects for nonprofits or internal tooling as part of their learning, reinforcing both technical and collaborative skills. The community includes discussion forums, local chapters, and peer support, which helps learners break through obstacles and stay motivated. The freeCodeCamp GitHub repository encompasses both the learning platform codebase (frontend, backend, challenge engine) and many support tools, community content, and contributions. ...