Private World War II militaria websites

Bills-Bunker.de: Several interesting articles, including a long article on the British Free Corps and US citizens in the Waffen-SS
Historisches und Militärgeschichtliches: Photographs and transscribed field letters (in German), as well as information on some German trucks. The navigation is a bit confusing, but there is a lot of interesting information
Panzerphotos.dk - photographs of Germany's tanks of World War II: Rare and unpublished photographs of Germany's armoured forces of World War II
Photosammler's historical online Photo-Archives: Photographs from Robert Noss's collection, as well as a very good guide for identifying fake photographs
War Letters: Scans and transscripts of many letters of US and UK servicemen from World War I and World War II. An excellent website for researchers
Wehrmacht-Awards.com: A portal for collectors of all kinds of Third Reich militaria