Thank you so much for the kind words and help in giving me some direction with these projects.  I am relatively new to Python, object oriented programming and open source collaboration.

I think the 3rd party module probably makes the most sense, because this is how I am currently using it.  The beginning of my code typically looks like this:

from tkinter import *
from tkinterFlow import *

But I will have to look at how to make or publish a module and so forth.  Then I would maintain the module with new releases.

I am also going to study Tk more.  I am fairly certain I can add the flow manager at that level.  Really the flow geometry manager as I have made isn't really a manager on its own.  It uses the grid managers methods.  (it could use the place instead of grid, but I chose grid).  

The main question I suppose would be does the community want a .flow method added to the Widgets in Tk or a 3rd party module?  I think I could make either one, given some time and study.

For now I will look into making the 3rd party module.  This is a skill I need to develop notwithstanding this flow manager project.

My main goal is just to make it easy for someone to implement flow behaviour.

Thanks again to everyone for your time and direction.