https://hobbycnc.com/tool-width-calculator/
Gcode viewer https://ncviewer.com/
http://flatcam.org/ Note: Ubuntu 22.04 --> use the beta version branch. Fix the vispy==0.6.6
https://youtu.be/6g8cbERx__U?t=717
Simple to start: https://copper.carbide3d.com/
For this one: make sure youset the origin right in kicad otherwise the flipping is strange
https://mellowpine.com/cnc/best-grbl-software/
UGS https://winder.github.io/ugs_website/ Does probe, but does not seem to apply the correction
Candle https://github.com/Denvi/Candle/tree/master/src Does probe and applies the heightmap. Not getting perfect results yet and slightly confusing workflow to apply heightmap
OpenCNCPilot https://github.com/martin2250/OpenCNCPilot Does probe and applies the heightmap. Looks like usable workflow
http://www.autoleveller.co.uk/autoleveller-ae-quick-start-guide/
https://bitbucket.org/daedelus1982/autolevellerae/src/master/