Mine really don't compare to many here, but:

Stipulas: LA 91, Ventidue, Duetto, Made for Levenger
Viscontis: Rag Time II, Van Gogh maxi, midi, midi, Ponte Vechio, Skeleton, Copernicus, Opera, Rinacimento

Montegrappa Harmony
OMAS: 360 Mezzo, 360 Magnum, Demonstrator, Arco Milord Celluloid, Tokyo, L. E. Marconi
Nettuno: Barracuda, Skipper

Underwood london (Italian company)
Marlen: Chagal, Journal, Continenti
Krone: Metaphor, Daddy O, Hyperbole
Marlen HTF Limited Edition
Lalex 1938
Marlen Shuttle

Delta: 366, 365, Dolce Vita Stout, Fluida, Corona De Aragon, Planet
Parafanalia BP

Stipula Novecento Chromo (missing-on its way to Italy for a new nib) box.
Nettuno Dolphin
Ancora Gioconda, Perla
Parafanalia Pinninfarina BP, FP
Aurora: SOLE LE, Thesi

And of course:
Piquadro pen cases (how'd that Nakaya get in there?????).