Hey guys! I'm planning on making a small 4 item, coin operated vending machine for fun. I want to cut some parts out with a cnc machine that my friend built. It takes gcode so the is no problem there. One of my problems is my current google foo abilities. I wanted to ask you guys what the best open source (or just plain free) cnc software is. I have some 3d software that can export stl files. I'm currently using autodesk inventor. I'm running on a mac but if I need to I can always run wine or break all my morals and install boot camp :p. Anyway, any help would be gladly appreciated. I'm sort of a noob when it comes to cnc stuff.