This site is for people doing research on the German side of the Night Fighter War against Bomber Command 1939-1945. There are many sites dedicated to the Luftwaffe and many to the NJG (in German), this is one for the entire NJG and in English.
You can search for specific NJG claims at Nachtjadg Claims Database Site maintained by Anders Näslund.
You can download a list of claims for German night and day fighters at Tony Wood's Site
A good place to get information on Bomber Command Losses is the 6 volume series by W.R. Chorley titled "Royal Air Force BOMBER COMMAND LOSSES of the Second World War."