site mentions a printed circuit CAD utility called GerbMerge.
"GerbMerge is a panelizer for Gerber RS274X and Excellon files created by the EAGLE CAD program. It can merge multiple, different jobs or copies of the same job. Jobs can also be rotated by 90 degrees.
In the new version:
"Support was added for the PCB layout program as well as Orcad and the newest Eagle version 4.11r2. A few minor improvements were made."
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