PDF Blender7 years ago · August 26, 2015 · 11:46 pm
The main purpose of this free tool is to concatenate multiple PDF documents in an arbitrary order. However, you may secure your documents with passwords and prevent others from printing it. It requires Ghostscript to run and is available in German and English.
You can download it from http://www.chip.de/downloads/PDF-Blender_13011984.html.