Brushograph
How to set it up
FluidNC (for ESP32 with webUI)
https://installer.fluidnc.com/
Arduino
https://github.com/ruizivo/GRBL-28byj-48-Servo
Universal Gcode Sender
https://winder.github.io/ugs_website/
Forked and reworked version of FluidNC to support uni-polar steppers
Repo by doms, with nothing on it:
Original "Arduino mini CNC plotter" and some interesting forks / remixes