With PDF Creator you can make any printable document into a PDF, but what happens when you need to combine many PDF’s into just one file.  It seems that PortableApps is on a mission to convert a whole lot of new applications into their suite and this is their latest addition.  With PDFTK you can combine, split, watermark, and rotate your PDF’s with one simple tool.  I had found something similar to this before but it wasn’t open source and it wasn’t free and it was pretty large.  This is a great little app that you can run on your pen drive or install it to your computer.  A must have for anyone who deals with PDF’s a lot.

PDFTK Website

PDFTK PortableApps website