Ancestry Search:
http://www.ancestry.com/

Cyndi's List:
http://www.CyndisList.com/

FamilySearch Internet Genealogy Service:
http://www.familysearch.org/

International Internet Genealogical Society:
http://www.iigs.org/

National Archives and Records Administration:
http://www.archives.gov/

National Genealogical Society:
http://www.ngsgenealogy.org/

New England Ancestors:
http://www.newenglandancestors.org/

Connecticut Historical Society:
http://www.chs.org/

Delaware Historical Society:
http://www.hsd.org/

Georgia Genealogical Society:
http://www.gagensociety.org/

Maine Genealogical Society:
http://www.rootsweb.com/~megs/MaineGS.htm

Maryland Historical Society:
http://www.mdhs.org/

Massachusetts Historical Society:
http://masshist.org/

New Hampshire Historical Society:
http://www.nhhistory.org/

New Jersey State Library:
http://www.njstatelib.org/

New York Genealogical & Biographical Society:
http://www.nygbs.org/

North Carolina Genealogical Society:
http://www.rootsweb.com/~ncgs/index.html

South Carolina Genealogical Society:
http://www.geocities.com/Heartland/Woods/2548/

Vermont Historical Society:
http://www.vermonthistory.org/

Virginia Genealogical Society:
http://www.vgs.org/