Here's another that's come into my inbox several times. Im eventually going to make banners for this to go on my pages (mostly as a reminder to me to put my daily click in). This link will take you to the tab for the breast cancer one but there are several other tabs you can go to as well. All it takes is a few moments to click this link then click the "click here to give" buttons. For every click, they give the item free to someone who needs it. The one for pets donates food for animals in shelters, the one for breast concer donates mamograms...etc you get the idea.
If you doubt this is true...here's the snopes page dealing with it: