Some of the many sites offering printable downloads
From Annapolis Makerspace Wiki
- Thingiverse
- {https://thangs.com Thangs]
- https://sketchfab.com
- www.tinkercad.com/things
- www.shapeways.com
- www.treatstock.com/3d-printable-models
- https://www.instructables.com/
- https://all3dp.com/1/free-stl-files-3d-printer-models-3d-print-files-stl-download/
- https://nasa3d.arc.nasa.gov/models/printable