Also http://ruggedcircuits.com/gerbmerge/Python script for panelizing. My python-foo is a little weak and I couldn't get it running on my Linux system however; YMMV.JoeN: If you want to do home etching you just need a program that will print an image of the top or bottom layers (bmp, png, etc.). You don't want Gerber format. Eagle handles that just fine and I'm sure KiCAD does as well.
Project Guidance is like a fast flowing river -- stuff disappears in hours.