This is a utility to compare whether lines of text are in both files or only one. I wrote this after I was asked to do what I considered to be an asinine manual task of recording inconsistencies between two sets of data. I had to write JavaScript to screen scrape one source, then use this program to compare it against the other.
From the utility itself, here's how it works:
Drag a file to each field and click the button. Breaking by Windows linebreaks (CRLF) it will look for lines in the first that match in the second. If matched they will be added to SharedLines.txt, but if in only one, they will be added to [Filename]-only.txt"