thats Foobar's site, a german regular who has been active in the main il2 forum for many years (ubi, simhq,1C, etc..). most longer term il2 users here in this forum will already know about him (he posts here and his site is often referred to by people who try and locate old oleg progress updates). it is usefull to let newer il2 users and other new 1c forum users know about
afaik he is also still an official addon/contributor for oleg's BoB project, and has been so over many years, and many of the buildings/vehicles/trains you see modeled there are specifically made by him for BoB, and images of them cant be found anywhere else (including here).