The following are sites where you can click to make a free donation. How it usually works is that when you click it takes you to a place listing several ads, and advertisers on the site pay for how many views the ad receives. You don't have to pay anything or buy anything, and all the proceeds are donated to charity. I have links to all such sites which I'm aware of, listed by category below.
Portals Sites incorporating more than one cause.
Programs which are part of these portals are marked with a asteric (*) in the categories below.
