Here are some of Heather Arthur's other projects on Github:

https://github.com/harthur/brain - neural network https://github.com/harthur/classifier - bayesian classifier https://github.com/harthur/clusterfck - clustering https://github.com/harthur/glossary - term extraction

You can see more here:

https://github.com/harthur?tab=repositories

Nice stuff.