Words histogram - words counting

Here's a small application to count words in a text file (words histogram). It shows the most used words and the count number. Screenshot from the linux version, counting words in the polish translation of romeo and juliette:

Download Link Windows

Download Link Linux

The counting code is taken from here: http://www.greenteapress.com/thinkpython/html/thinkpython014.html#toc144
I added the Tkinter gui and easygui fileopenbox.