Spreadsheets are a pretty useful and powerful tool when it comes to doing ad-hoc data analysis, but it's kind of annoying to get data in and out of them from command line tools.
I'm actually working on this, although for various reasons I had to reimplement the formula parser (corner cases are a pain). Screenshot (in progress): http://i.imgur.com/snyBhYH.png
Slightly related... I reckon a command line / ncurses version of Excel would be really useful. Am I crazy?
e.g. something like http://upload.wikimedia.org/wikipedia/en/e/ec/Lotus-123-3.0-...
Spreadsheets are a pretty useful and powerful tool when it comes to doing ad-hoc data analysis, but it's kind of annoying to get data in and out of them from command line tools.