Ancestry.com Family History Wiki: State, county and town resources
Cyndi's List: Extensive catalog of online genealogy websites
Family Search Wik:i Extensive catalog of online genealogy websites
Library of Congress State Digital Resources and Memory Projects: List of state-level archives
Linkpendium: A directory of online genealogy resources, specializing in U.S. records
USGenWeb: A website featuring genealogical records for states and counties in the U.S.