Contrary to popular belief, Adobe is not the only source of creating PDF documents. There are several no-thrill alternatives which cost significantly less or are free. All you need to do is install the software. Doing so will set it up as a printer driver on your PC. From then on, creating a PDF is as simple as printing the document using any program and choose your PDF driver as your printer rather than your noral printer.

One such free alternative is PDF Creator. The name says it all, any application you can print from can be redirected to the PDF Creator driver and the output will be PDF. Check it out here:
http://sourceforge.net/projects/pdfcreator