A couple of years ago the only option for creating or modifying PDFs was to purchase Adobe Acrobat. These days there are lots of free utilities that let you create your own PDFs and manipulate them. I’ve previously covered PDFCreator, CutePDF, and doPDF.
The Reader to Reader section of the December 2007 issue of Windows IT Pro magazine mentioned PDFTools 1.3. I haven’t tried it, but the site explains it this way:
PDFTools is a PDF management application. It can encrypt, decrypt, join, split, stamp, create and rearrange a PDF file.
Version 1.1+ includes a very powerful and simple to use XML to PDF converter.
Also, Download Squad recently mentioned a different utility called PDF Split and Merge. You can use the utility to extract pages from a PDF, break up a PDF into sections (a 100-page PDF can be made into 5 20-page PDFs), or merge multiple PDFs into one file.