Append PDF software automates the process of appending multiple PDF files together, you can append to a new pdf file, an existing pdf file or append a list of files together, the result file is optimized for space. PDF Size optimization is upto 50% better than appending files in Acrobat and using other tools that use Acrobat to append, It also retains bookmark positions to new positions in the output PDF.
Optional parameters to only append pdf's with over, under or equal to a certain amount of pages.

In our tests the appending speed is upto 70 times quicker than acrobat 7 append + save!
simple command line parameters:
e.g. AppendPdf in1.pdf in2.pdf -ooutput.pdf
e.g. AppendPdf output.pdf in3.pdf
e.g. AppendPdf list.txt -ooutput.pdf
list.txt file contains:-
in1.pdf
in2.pdf
in3.pdf
Evaluation Restrictions are:- unrestricted, license page at end of every append.

The license of this software is Free Trial Software, the price is $449.95, you can free download and get a free trial.