The last one, CutePDF doen’t have a pop-up like pdf995 does.
When you install them, they are installed as a printer so when you go to print your report you select it as the printer and it creates the PDF and saves it where you tell it to.
PDFCreator is yet another free option that I like to use. The professional version of Adobe Acrobat has a few advantages in that you can also edit pdfs.