PDFCreator converts every printable document to PDF and many other formats. Convert your Documents to PDF, JPG, PNG, TIF and more, mMerge multiple documents to one file and use automatic saving to have a fully automated PDF printer.
Yes, PDFCreator is open source! You can find the source code on GitHub: https://github.com/pdfforge/PDFCreator.
Stable Release 2.3.0 published on 2016-02-29
This page shows the most recent stable release.
You can browse all releases here.