This utility allows assembly of stl files and obj files (files that describe 3D printable objects) into one larger stl file under mouse control. A tool in its infancy.
To run it, you need to have the Processing language installed. Just put all the files in your Processing directory under a directory named TripleD and open up the TripleD.pde file with Processing, run it, and follow the text directions displayed in the window that pops up.
Les