I expect something like this is helpful, but it is a site index only at this point and does not link to the charities.
Added Esperanca. This organization is well established--since 1970.I read about Mozambique which was very sobering, especially to find out that the average life span there is just 38 years. Esperanca works in Mozambique, Bolivia, Mexico, Nicaragua and the United States.
Just started reading Give A Little, by Wendy Smith and already felt it should be added to the list. She also has a website here.
Added Feeding America and the Darfur Stove Project. I think the Darfur Stove Project is a really inspiring project.
Also added NothingButNets which stops the spread of malaria.
Librarian-Educator living in Amherst, Mass.