Please visit GiveWell.org This CharityScorecard.org site was in use from 2006 to 2008, but is now mostly dormant, and the material here is out of date.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.

From CharityScorecard

Cost-Effectiveness Analysis (CEA) 

An analysis that looks at results per unit cost, where the costs and the results are not typically not quantified in the same measurement units. For example, cost might be in "US dollars", with results in "number of lives saved". In contrast, see CBA.