This is a collection of 3D models designed by myself on OpenSCAD.

This generates staircases which can be helpful for calibration of 3D printers. For example, if you want to generate a model for stairs where each step has 0.5mm of height, you should run the following command:

openscad -o stairs-0d5mm.stl -D "step_height=0.50" stairs.scad

There are a bunch of parameters on the module itself you can play with.