kamit.com Kevin A. Mitchell writes GIFConverter and other cool stuff.

I've always thought that Emacs was an interesting editor (development platform?) since it is extensible in the same programming language it's written in: Emacs-Lisp. Not only that, but you can extend it at runtime, right while you're using it.

I've wondered: What if the same thing could be done with a Python program on OS X. You could even start with a minimal program, and add functionality to it while running it, saving the intermediate results to disk so that the next time you start the program, you start up with all the state and functionality that was there before.

At the very least, it'd be nice to have a robust Python interpreter running concurrently and inside of the program under consideration.