Robert Martensson has created a nice site describing a rarely-touched aspect of WWII: The Battle for Norway.
The owner of the Axis History site cautions: “This is an apolitical site dedicated to the history of the Third Reich and its allies. This is not a Nazi site, and I am not a Nazi.”
Its a good warning, because this sort of thing could easily be abused. That said, this is a good site with lots of information for wargamers. Of particular interest are the sections on the Axis allies, which have lots of good information on the units, decorations and equipment used.
Mike Cooper has a web page with useful information on World War Two vehicle camouflage. IIt includes text descriptions, as well as a virtual “paint chip” gallery.
The League of Augsburg website has a pdf quick and dirty guide to painting World War II Germans. There are some good suggestions in here as to which Vallejo and other paint lines to use.