FreeRice.com

FreeRice is a Web site dedicated to generating funds which go towards ending hunger and providing free education. Founded in October 2007 by John Breen, the site was donated to the UN World Food Program (WFP) in 2009.

In the form of a word game, with different levels of difficulty and diverse topics, FreeRice tests the vocabulary of participants. The companies who hang their banners on the Web site donate money to the WFP to buy 10 grains of rice for each correct answer.