Free Rice is what actually started me using AutoIt!
I had made a macro in Excel, using VBA, which would read the Free Rice page source and store the words as I played. However I would have to move my mouse from Free Rice to Excel and back again over and over in order to learn these words and look up the current word. Then I found AutoIt! Now the mouse moves itself, and clicks the correct answer. I have found 10,060 different words, about 200 per level. Unfortunately the script isn't self contained in AutoIt. Periodically clicking on the ads is a good idea as well; I should add this into my routine.
However the script here is awesome. I wonder how much of the average 200 million grains of rice donated daily are by bots, haha.