There are numerous free PDF tools on the web. After a long search we found the PDF-Creator on the pc-Welt website. This is a professional and open source software for PDF creation. The special feature of this program is that you can install it like regular printer which you can use in any software. Just select "Print" and choose PDF-Creator. Change the printing settings to high quality and "print" your document as a PDF file.

You can download this free tool here.