[seligman99]

Along the same lines, I made a command line calculator that does basic unit conversions, and has a few other tricks up it's sleeve

https://github.com/seligman/human_calc

I find it surprisingly useful. It's probably one of those things that has an audience of one, but I find it useful.

[tonyonodi]

This is really cool, you're a braver person than I for tackling the English representation of numbers stuff!