pinterest.com
In short: Pinterest (pinterest.com) accepts business profile/pins. It is free + paid tier to submit, takes only a few minutes, and scores 65/100 on our impact ranking (useful).
Create boards for PDF/image/calculator tools linking pages.
Good for visual/tool use cases; design pins needed.
Priority is medium, which sets the band. It is free + paid tier and quick to complete, which adjusts it within that band. The score ranks your queue — it is not a measure of domain authority.