I have seen plenty of parametric 3D CAD applications, like freecad and Autodesk, but only one that is line-based (Sketchup) and thus can easily edit STL files. Are there any other line-based 3D modelers like Sketchup.
It would be nice if it could run on Linux. (natively; I do not prefer online applications.)
I also would prefer not to have to create an account.
Mac-only software will not work.