ChiliPeppr - Hardware Fiddle
GRBL G-Cpde sender
grbl - An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino
LaserWeb4 - Collaborative effort on the next version of LaserWeb / CNCWeb
MakerCam - CNC CAM and G-code sender.
CNC PCB drilling using Matrix Transform.