Weight graph with trend based on "The Hacker's Diet"[1], with the addition of
percent body fat (%BF) and its trend.

Tweak the configuration at the top of mg.rb and mg.sh. I use a script like daily.sh to automate things. I might type something like this in the morning:

    ./daily.sh 120kg 1.49l

1. http://www.fourmilab.ch/hackdiet/