The demo you see above is a configurable version of the original animation, which we used internally to tweak the scenes so they were just right. It should give you a little more insight into what's going on under the hood, but it's also pretty fun to play with!
You'll also notice that we've made some of our early prototypes available, complete with source code, along with a couple of visualisations of the finished project.
The opening credits are 100% open source - the code is a little messy but if you're curious how it's all put together you should check out the project on Github at smallmultiples/south.im.
If you're interested in finding out more about the tools we used, have a look at the README file on Github.