Dizionario milanese-italiano, col repertorio italiano-milanese by Cletto Arrighi - dictionary useful in translating between Italian and the Milanese dialect (free).
Dizionario genovese-italiano by Giuseppe Olivieri - dictionary useful in translating between Italian and the Genovese dialect (free).
Gran dizionario piemontese-italiano by Vittorio di Sant'Albino - dictionary useful in translating between Italian and the Piemontese dialect (free).
Nuovo dizionario siciliano-italiano by Vincenzo Mortillario (free).
Dizionario italian ed inglese by Ferdinando Altieri - 18th century dictionary useful in finding older Italian words/occupations no longer in use (free).
...and there are many others. Explore!
