Cyndislist.com
Portal site with links to just about every online family history site.  Constantly updated.

EllisIslandRecords.org
American Family Immigration History site, contains comprehensive lists of immigrants to the United States with searchable databases of names, dates, nationality, ages, ships registers, ships crew members. Very popular site, often busy.

Family History Indexes
Family history data CD's and publications available for purchase on a number of historical subjects including the Battle of Jutland Roll of Honour and Dambuster crew lists.

FamilySearch.com
Impressive online resource, with data from parish, census and local government records.

Gazettes on Line
An invaluable resource - the London, Belfast and Edinburgh Gazettes for the First and Second World War. Select the 'Archive' link at the top of the page and use the online search facility.

GenealogyLinks.net
Lists 7,000 links, most of them to online surname searchable records such as ship's passenger lists, church records, cemetery transcriptions, military records and census information.