Charity Navigator

Charity Navigator works to make impactful philanthropy easier for all. Charity Navigator's goal is to equip the entire philanthropic ecosystem with the tools, ratings, and information they need to make impactful investments. In addition, Charity Navigator works to expand the number of people and organizations who understand and commit to the idea of intentional philanthropy. And Charity Navigator strives to deepen the community's commitment to giving.

http://www.charitynavigator.org