Altium Designer PCB design software can export its own projects (.prjpcb) to several PCB/gerber formats, including somewhat generic .pcb files. Used to generate a design so it can be used in other programs or machines.
Convert Altium Designer project file to Printed circuit board design file.
We found one software available in the database for this conversion.
Microsoft Windows software - convert prjpcb to pcb on Windows
A PCB and FPGA design software
Convert from prjpcb file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.