This is an application that I am currently working on, so it's very much in flux. It's not a product—it's my hobby, so it has a very flexible design, that is, no spec! When I find new ways to do things, I rewrite vast chunks of it to take advantage of that knowledge. This is in no way an example of a production project, but it is an example of how you, too, can create some very interesting tools to explore algorithms you're interested in.