Tools that draw a part while you watch and hand you the file to make it: mostly STLs for the printer, plus one for the laser and one for card and scissors. Nothing is uploaded, nothing needs an account, and everything here is free to print, remix and sell.
The geometry is built by Javascript in your browser, a triangle at a time, and the STL is assembled there too. No server sees the part, and there is nothing to sign up for.
Every part is oriented for the bed, so it goes into the slicer flat and needs no supports. Millimetres throughout, and a binary STL any slicer will open.
Printers disagree about holes by a few tenths of a millimetre, so anything that has to fit something else is worth printing small and once before you print it for real. Where a tool can loosen or tighten a fit, it says so.
Free to print, remix and sell. No attribution needed, though it is always nice to hear where one ended up.