As a repository of digital models, Thingiverse is a tough incumbent to tackle. But that isn't stopping 3D software company Physna from trying. Physna is the company behind Thangs, a Thingiverse competitor powered by "a new software that codifies three-dimensional objects in a new way, providing a deeper understanding of their physical properties, their components, and the way they fit together," the company writes. Notably, their approach enables "Geometric Search," whereby users can find models geometrically similar (i.e. physical properties, measurements and features) to those that they've uploaded.

"[Thangs'] parts recognition algorithms…know how parts fit within assemblies and makes accurate predictions about each object's function, cost, materials, performance, compliance and more."

Thangs is free, offers unlimited storage and currently has "over a million" models ready to be searched. You can check it out here.