thingiverse.com
In short: Getting listed on Thingiverse is free. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: Publish your own 3D models and add your site to your maker profile.
Publish your own 3D models and add your site to your maker profile.
Only upload designs you own; spam uploads are removed.
Open the submission page on thingiverse.com and complete its form — that is the "Open submit page" link at the top of this page.
Only upload designs you own; spam uploads are removed.
Priority sets the band — this one is later. Cost (free) and effort (moderate) move it within that band, which puts it in the long tail tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.