Photographs and biographical information on soldiers killed during the First World War.
http://www.gravesecrets.net/wwi-pictorial-honour-rolls.html
McMaster University website has World War I trench maps and aerial photographs of France and Belgium available online.
http://library.mcmaster.ca/maps/ww1/home
Contains the names of about three million Jews who died in the Holocaust. Information was submitted by surviving family members and can include quite a lot of detail. There is also a smaller survivors' database.
http://www.yadvashem.org
This site has transcriptions of engagements and marriages, births, deaths, probates and memoriams published in the Yass Courier.
http://members.webone.com.au/~sgrieves/yass_courier.htm
Transcriptions of thousands of births, marriages and deaths in Yorkshire taken from the local register office indexes. Part of the UKBMD Project.
http://www.yorkshirebmd.info
Historic film footage of Yorkshire available online.
http://yorkshirefilmarchive.com
This wiki is hosted by the National Archives in the UK and contains user-contributed articles relating to material held at the National Archives at Kew.
http://yourarchives.nationalarchives.gov.uk/index.php?title=Home_page