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npmjs.com
In short: npm (npmjs.com) accepts package homepage link. It is free to submit, takes a moderate amount of preparation, and scores 84/100 on our impact ranking (high impact).
Publish @your tool/embed or utility package with homepage.
Only after package exists; keep license clean.
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.