Mathematica notebooks (.nb) can be exported as PDF documents right inside the main program using the Save as.. function. There seems to be other file types that also use nb extension for their documents formats and for these, their respective programs should also be capable of PDF export or print via virtual PDF printer.
Convert Mathematica notebook data to Adobe Portable document format.
We found one software available in the database for this conversion.
Microsoft Windows software - convert nb to pdf on Windows
Math visualisation and computing program
Convert from nb 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.