Aircraft list from gennadich forums:

PC - player (flyable)
+ - full construction (finished?)
* - under construction


FR

Nieuport 17/17bis/23 (PC)+
SPAD XIII (PC)+
Breguet 14 (PC)*
SPAD VII (PC)+

Nieuport28+
Salmson 2 A2*

GER

Albatros D.III (PC)+
Albatros D.V/Va (PC)+
Fokker DR.1 (PC)+
Gotha G.V / AEG G.IV (PC)*
Fokker DVII (PC)+

Pfalz DXII+
Halberstadt CL.II+
Hannover CL.III*
Pfalz D.III/IIIa+
Roland D.VI+
Rumpler C.IV+
DFW C.V+


GBR

S.E.5/5a (PC)+
Sopwith Camel (PC)+
R.E.8 (PC)*
Sopwith Triplane (PC)+

Sopwith Pup+
Sopwith Dolphin+
Sopwith Snipe+
DH4+(PC)*
DH9+
Bristol Fighter+
Handley Page 0/400*


Once upon a time, A. Petrovich wrote: "Thank you all, guys, for your attention to FM"