* PDF Split And Merge
  * PDF Split and Merge is a very simple, easy to use, free, open source utility to split and merge pdf files. It has a simple graphical interface to let the user choose pdf files, split or merge  them. Pdfsam is written  with Java  Swing that  is ''a set of Java class  libraries provided as part of  Java 2 Platform, Standard Edition (J2SE) to support building graphics user interface (GUI) and graphics functionality for client applications that will run on popular platforms such as Microsoft Windows, Linux, and Mac OSX.''
 * http://www.pdfsam.org/