How to merge split PDF’s for Free

PDFTK http://www.pdfhacks.com/pdftk/ is a command line free opensource tool that can do many things to PDF’s like merge and split them and you can get PDFTK Builder http://angusj.com/pdftkb/ that is a GUI for the main functions of the tool. This is better then spending lots of money for a tool and its small if you want the command line version. It is also available for other OS’s too.