UK Sources:

Index of Registration of Births/Marriages/Deaths

Family Records Centre

The National Archives

The Commonwealth War Graves Commission

The Guild of One-Name Studies

Derbyshire Record Society

Society of Genealogists

GENUKI

Non-UK Sources:

Family Search (USA)

The Ancestry Search-Database (USA)

Australian Family History Compendium

Australian Genealogy Web Network - AGWEB

Roots Surname List (USA)

USGen Web (USA)