Are there any free tools that are helpful in designing cases or panels? I think I'm basically looking for something that will let me lay out where a sheet of aluminum is going to have holes drilled or punched in it, as well as being able to lay out the silkscreen graphics.
Depending on what format vendors who offer this service want, I could imagine that PCB might well be able to generate the drilling instructions (although I'm not sure it represents non-square holes very well graphically), but I get the impression that pcb isn't really the right tool for making nice looking artwork for the silkscreening.
