Sites with Genealogical Source Material

US Sites

Definitions of the State Mnemonics are available for those who are unfamiliar with the format.

Index to GENWEB sites. A good starting point if you have the time to explore all US States and Counties.
USGENWEB Archives - main index page.
SSDI - Social Security Deaths Index (this is part of the Ancestry Inc. Web site).
US Census Bureau - 90,000 names.
1790-1860 Census - subsets of data.
Civil War Soldiers and Sailors
Civil War - the most amazing collection of information on this American Civil War home page. This could keep you occupied for hours.
Cemetery Listing Association - database contains 90 cemeteries and 6830 graves. Search can be found here
Legionville - the first training camp of the US Army (home page), including transcriptions of the West Point Orderly Books for 1792-1796.
Locations for US cemeteries, churches, schools etc., by John Robertson
U.S. National Archives - Catalogue of Passenger Arrival and Immigration Records.
U.S. Colored Troops (Civil War) database main page, and currently has search here
Early Marriage Records for Connecticut, Massachusetts, New York, Pennsylvania and Virginia. Dates vary but none after 1824. Database search. Also part of Ancestry Inc pages, and you will need their main page
Land Deed Data Pool -- currently with some counties of Kentucky, New York, Pennsylvania, Virginia, and West Virginia. The files are in MBZ compressed format - use WINZIP if you have it rather than download GZIP from their page.
Early New England Ministers
Loads of records for Connecticut and New Jersey Counties including, Pre-1790 Colonial Tax, Quit Rent, Oath of Allegiance and Census Index Records.
Pearl Harbor - list of all known casualties, civilian and military - 117Kb.
Slave Entries in Wills -- includes Kentucky, Mississippi, Missouri, South Carolina, Tennessee, and Virginia.
Officer Down memorial page for those killed in the line of duty.
CD Look-ups - slightly different. Enables you to request a look-up for a variety of US Census data and other bits and pieces.