PDF U Append Dekstop Edition 1.14   
by Traction Software   

PDF U Append Desktop Edition software Automates the process of appending multiple PDF files, PDF U Append will append your many PDF documents into one PDF document at the click of one button, Features include drag and drop and loading, append page ranges, saving batch lists for later use & many other options.
If you are looking for a server solution then try out the PDF U Append Server for seamless automation from the command line.
NOTE: This Software requires Full Version of Acrobat 4 or 5 by Adobe Software