http://www.ancestry.com
2. genealogy.com
http://www.genealogy.com
3. FamilySearch
http://www.familysearch.org
4. Family History
http://www.familyhistory.com
5. AFIHC
http://www.ellisisland.org
6. Origins
http://www.origins.net
7. National Genealogical Society
http://www.ngsgenealogy.org
8. AncientFaces
http://www.ancientfaces.com
9. Cyndi's List
http://www.CyndisList.com
10. Genealogy Pages
http://www.genealogypages.com