this is a unique website where you can donate free rice for hungry people all over the world. All you need to do is just to test your vocabulary. For every correct answer you donate 20 grains of rice.This site was just launched in october 2007 and since then 37 billion grains of rice have been donated.
If you come across such websites please mention it in comments. this site is sponsored by different organziations which donate rice on behalf of you.