The Milwaukee Makerspace has a CNC Engraver that can be used to make circuit boards. The wiki for the engraver says that there is software called DipTrace on the computer. I assume that this software is used to create the PCB design.
I downloaded the software and installed it on my Linux laptop. The program is made for Windows but my Linux OS automatically launched Wine to install the program. Cool!
I spent about an hour designing a simple circuit on the PCB. I was able to figure it out without reading a manual. If I make it to the Makerspace this week, there might be someone there who can help me take the next steps and use the Engraver.