Atheist Organizations and Tax Deductions

Don't know why it didn't occur to me before this morning while  reading about the gazillionth atheist whine about donations to religious organizations being tax deductible but I know for a fact that donations to the anti-religious:

American Humanists Association
Ayn Rand Institute

Center for Inquiry

Committee for Skeptical Inquiry (I ususally write "Skeptical" in quotes in this case)

James Randi Educational Foundation (same for "Educational")
Council for Secular Humanism 
Freedom From Religion Foundation
International Institute for Humanistic Studies
etc. 

.... are tax deductible.    

How many of them are directly involved in care of the sick, feeding the poor, clothing the naked or other legitimate reasons for tax deductible status? 

You care to add to the list of atheist and anti-religious organizations that have "tax-deductible" status?