Hey! I am Ben Hastings, PhD student in the Stellar Evolution group at the Argelander-Institut für Astronomie, Bonn
Here is my page on making interactive plots for stellar evolution calculations: Interactive MESA Plotter.
Here is an interactive tool to explore the semi-empirical mass formula. What is the semi-empirical mass formula? I have a short description here.
Here you can find an interactive plot to fit isochrones to a star cluster.