🚀 go-pugleaf

Several years ago, I wrote some documents using DWB.  I no longer recall which
flavor of Unix it was on.  In addition to the current DWB products for 
formatting, this system also had a program that gave readability scores for
the document.  Three different scales were reported; I remember the Kincaid
and Flesch scales, but not the third.  The program also reported on other
objectively-measurable characteristics of the document.

It seems like this program was named proof.  I cannot find it on any of the
systems I now have access to, nor do I find any mention of it in the DWB
doc I have.

Can anyone help me find this or similar software?  Comments on its reliability
are also welcome.

Bill Gray

PS.  I am new to the net.  If this post is misplaced, I apologize.
PPS. My employer studiously ignores my opinions about everything.