Great idea! Follow this link: http://appsumo.com/~_z6T and you can win a paid account for Github!
Here a unix command line script to count code lines for your project (or something else!).
And do you know this? Typing in google “x/3, (x/2)^2” for example or another functions it draw a scrollable graph like Google Maps! Cool! http://goo.gl/x1RAs