Mobile and Facebook games have a real knack at sucking you in and making you spend money. Village the Game has all the addictive qualities of Farmville, but your in-app purchases fund real-life farms in places like Zambia.
While other games have had select charitable in-app purchases available, everything in Village is a giving opportunity. When you build a well in Village, real people get a well in a place that needs it, facilitated by Seeds of Hope. The game is also a learning experience, since the solutions in Village are what works in the real world.
Currently funding version 2.0 on Kickstarter, Village 1.0 is publicly available and in beta.