This is a small utility for prepress, used to determine how much to shingle or creep your job based upon paper thickness. The resulting numbers can be placed into Preps, Dynastrip or whatever imposition product you are using.
What is new in this release:
The latest version allows you to enter your own paper types into the system so that you don't need to waste time reentering the data.
This should work on most OS X systems from 10.3.9 onward.