Create a PDF Free

The website isn't very fancy, but the product is. PDFCreator is a PDF printer. When it is installed, you need to select it as a printer, and it'll turn whatever you're printing into a PDF. Of course you could just use OpenOffice and export as a pdf. If you want to make PDF's directly from Microsoft Word you can download 2007 Microsoft Office Add-in: Microsoft Save as PDF. It works great.