This is a small tool to visualize the structure in strings by drawing arcs connecting repeated substrings. The project is inspired by Martin Wattenberg's Shape of Song project.
So far, I've just got a mockup, which you can see at the top-of-the-page link. It's got two panels. The large left panel contains the arc chart, and the right panel contains a text input, along with a few buttons to load sample strings into the text field.