Hi,
hobbyists, who don't want to spend money on CAM software may try cam.py
cam.py is developed and copyrighted by Prof. Neil Gershenfeld from the MIT (Massachusetts Institute of Technology), but free for, quote, "experimental and personal use".
cam.py generates G-Code from *.svg, *.dxf, *.cmp,*.sol,*.plc,*.sts,*.stc,*.gtl (Gerber) und *.jpg files.
cam.py runs best on the Linux OS, but it should run on MS-Windows with Python installed also...
Regards,
Fritz