FreePCB2CAD is a small utility for converting FreePCB .fpc files to GenCad format, is supported by various PCB layout programs and other tools for interchange of PCB data.
This program can also be run from the command line:
FBCB2CAD filename.fpc filename.cad or FBCB2CAD filename.fpc
FreePCB is a free, open-source PCB editor. It was designed to be easy to learn and easy to use, yet capable of professional-quality work. It does not have a built-in autorouter, but it can use the FreeRoute web-based autorouter at freerouting website.

The license of this software is Freeware, you can free download and free use this cad software.