This site offers enhanced searching of a range of different online databases. There are also translating tools and resources on the holocaust.
http://stevemorse.org
The State Museum at Majdanek, Poland, holds documents including prisoner details, memoirs, letters and reports.
http://www.majdanek.pl
The International Tracing Service (ITS) in Bad Arolsen serves victims of Nazi persecutions and their families by documenting their fate through the archives it manages.
http://www.its-arolsen.org/en/homepage/index.html
This website has a huge amount of information for those doing Jewish family history research. It includes family trees, a holocaust database, research interests and much more.
http://www.jewishgen.org/#
This website has oral histories of Jewish survivors of the Holocaust and is part of the British Library's Archival Sound Recordings site.
http://sounds.bl.uk/Browse.aspx?categ...seby=Browse+by+interviewee&choice=A-C
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