FamilySearch
The largest genealogy organization in the world. Millions of people use its records, resources, and services to learn more about their family history.
http://www.familysearch.org

Genealogy.com
Access online data collections and CDs for vital historical records to fill the gap in your family tree research.
http://www.genealogy.com/

The Genealogy Home Page
Features links to genealogy tutorials, resources, newsgroups, online resources, maps and software.
http://www.genealogyarchives.com/