SmartSketch program supports PDF export function which can be used to export the default *.igr files as PDF documents. There doesn't seem to be any other program capable of working with IGR files, so the SmartSketch software is the only option for this conversion.
Convert SmartSketch drawing design to Adobe Portable document format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert igr to pdf on Windows
SmartSketch is an innovative product for the technical office, combining world class business diagramming with award winning drawing technology.
Convert from igr file
to pdf file
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.