I have a need to compare two drawings, and then highlight the changes in red for a factory. The thing is we need software to do it for us, since we will forgett/miss some of the changes - and that is really expensive to do.
Is there any free opensource comparission software, maybe some php solution out there you know of? Or QCAD/AutoCAD plugin? I fund one, but it was really expensive, and I like to promote Open Source software.