The Finns had several schemes.
The main two that are coming to my mind are the Gray, Brown, and Green scheme which was their "standard" summer scheme. Then there was the "winter" scheme with the large blue strips.
The British did some interesting schemes in the desert, and there is no doubt that the "Mickey Mouse Ear" scheme is interesting.
The Japanese were all over the place. Different Greens, Browns, and Khaki's.
One I did forget to mention was the French. They had some interesting camo's too.
But, there is no doubt about it. As far as flexability goes for a "official" camo scheme. Nobody beats the German's from 1943 to 1945.