Hmmm... are we talking owners or models? Looks like... Olympia (IBM/AEG) travelling, Olivetti L82, No idea about the middle one, Hermes baby/rocked 60's styling (but still metal) and a Montana.
I'm not sure, but I'd guess a Montana Luxe, Olivetti (but I do not know the model), and one of the cases looks nearly like the one for my Tippa S. As for the rest I have no clue.
Left to Right, my best guess (and it is a only a guess): AEG/Olympia Traveller, Olympia Splendid, Antares Parva perhaps, Adler Tippa (?), Hermes Baby.This would be a LOT easier if you took the covers off!
Thanks for participating! I will heed Rob's advice to take the covers off, but here is an ex ante disclosure: from left to right... tata.. Olivetti Tropical, Anitech MS100 (you probably have never heard of it - me neither, before buying the machine), Montana, Hermes Baby, yet again Montana (earlier version).