Martin Raynsford has written an article detailing his open source laser cutter project:
Now that I have an easy way to switch controllers into my laser it’s time to try out some of the different softwares. I’m quite comfortable with Arduino and I’ve got a fair few of them kicking round my house so that’s a good place to start so GRBL is the first controller that sprang to mind. It’s a simple G-Code interpreter and there are a myriad of programs that send G-Code out via a serial port.
See part 1 here.
Huh, that logo looks awfully similar design-wise to one used for my open-source laser lightshow controller (The LaserShark)