PDFCreator easily creates PDFs from any Windows program. Use it like a printer in Word, StarCalc or any other Windows application. and it is an open source project.
PDFCreator 0.98 has some improvements ,
* Uses GPL-Ghostscript 8.64 now.
* Improved PDF/A compatibility.
* New output format SVG (experimental)
* Improved check for updates on PDFCreator.
* Improved COM interface
* plus small fixes and improvements
For details, please visit
http://sourceforge.net/projects/pdfcreator/