I wrote this in a few hours to keep my assembly chops up.
Kisslicer is a pretty awesome (old, though) slicer to convert your 3D models into gcode slices for 3D printers. This keygen is for the old final version, not the new beta. I haven't tried it on the beta, who knows, maybe it works
It's written in Python, so you need to have that installed to run it. Upside, that means it's open-source!