Italy during World War II

Axis History Factbook: The largest website on the Internet dealing with the Axis forces of World War II, with excellent information on both major and minor nations
Comando Supremo: Italy at War: The largest website on the Internet about Italy's army during World War II. Covers every part of Italy's army, airforce and navy, and also includes a discussion forum in English
World War II Armed Forces - Orders of Battle and Organizations: Dr. Leo Niehorster's excellent website, with orders of battles for pretty much every country which fought in the war. His website also include errata pages for his books, and other interesting pieces of information