Homebrew PCBs

Hi, I wanted to know your opinions on a good low cost or free program
to panelize/print accurate 1:1 panels of PCB layers for my diy pcbs.

I like to take the gerber outputs and organize to get all layers on a
single panel in different sections and flipped as needed. For direct
etching using my inkjet setup( per volkan inkjet method )

Thanks for you ideas and suggestions,
-Lee