freecodecamp.org
In short: freeCodeCamp News (freecodecamp.org) accepts long-form technical tutorial. It is free to submit, takes a moderate amount of preparation, and scores 84/100 on our impact ranking (high impact).
Create a comprehensive tutorial around a reusable privacy, file-processing, accessibility, or security technique, with your tool only as a natural example.
Follow the current contributor and Hashnode workflow; content must teach, be original, and avoid promotional intent.
Priority is high, which sets the band. It is free and moderate to complete, which adjusts it within that band. The score ranks your queue — it is not a measure of domain authority.