Superb Russian Tank's Site, by Vassili Fofanov.
Very Good Site with lots of info and pictures.
Huge site, I like it a lot.
Well, WW1, quite complete.
WW1, very good pictures.
First-hand knowledge from an experienced tanker.
Amazing! A travel agency with tours for tank lovers!
http://www.pmulcahy.com/tanks/tanks_2.html
Not a single picture or graphics, but you'll find all the data you want, for sure.