This CharityScorecard.org site was in use from 2006 to 2008, but is now mostly dormant, and the material here is out of date. The GiveWell project has similar goals and is being actively maintained. I've left the old CharityScorecard.org content here just for the historical record.
A 501(c)(3) is a non-profit organization that is incorporated in the United States and has been granted tax exempt status by the IRS under the US Internal Revenue Code section 501(c)(3).
