Nothing But Nets
The United Nations Foundation's Nothing But Nets is an organization you can count on in crunch time. It delivers much needed bed nets that protect people from Malaria mosquitoes. In honor of World Malaria Day (tomorrow), it's launched a campaign to increase the number of nets it distributes. All you have to do is play this awesome (and free) interactive game and a net will be delivered in your name. Simple. Effective. Fun.
You can take a look at a slide show of real world distribution here and, should you feel so inclined, offer a traditional financial donation here.