Add more context to README and point at Java and Python versions.

README.md

@@ -20,6 +20,30 @@ This package is also available through the [Matlab File Exchange](https://www.ma
 * ocontourc
    A replacement for **contourc** that guarantees contour orientation.
 
+
+## Ports to Other Languages
+
+My need to generate quality graphics representing constrained optimization problems
+keeps coming back.  Each time in a different language.
+
+In January 2006, I first needed to produce quality graphics in Java to represent a constrained
+optimization problem.  To accomplish this, I implemented a custom Graphics2D Stroke that would draw hatches
+along a line as the line itself was drawn.  Consequently, anything drawn with Java's
+Graphics2D could use this custom line style.  I recently released the
+[Java version](https://github.com/ramcdona/HatchedStroke).
+
+Most recently (March 2019), my team once again needed to visualize constrained design
+spaces; this time in Python and Matplotlib.  So, in a bit of déjà vu, I wrote the
+same tool again.  This time I submitted it to the upstream project, and after
+traversing their contribution process, it was accepted for inclusion in Matplotlib
+version 3.4.0 -- first released in March 2021.
+
+Similar to the Java approach, it is implemented as a PathEffect in Matplotlib and should
+be applicable to any line drawn.  Update your Matplotlib to 3.4.0 or newer and you'll
+have this capability.  Check out their example gallery for some documentation and examples
+on using [TickedStroke](https://matplotlib.org/stable/gallery/images_contours_and_fields/contours_in_optimization_demo.html#sphx-glr-gallery-images-contours-and-fields-contours-in-optimization-demo-py).
+
+
 ## License
 
 This software is Copyright (c) Rob McDonald 2006-2021 and is released under the terms specified in the [license](license.txt).