Interactive Italian Language Course - Twenty lessons with sound samples and pictures. Very interactive, with activities throughout the grammar lessons. - http://academic.brooklyn.cuny.edu/modlang/carasi/site/
Italian 100 Exercises: Preliminare - Beginning Italian lessons with colorful pictures for vocabulary items. Includes exercises, puzzles, and quizzes. - http://web.uvic.ca/hispanital/italian/italian100/prelim/
Adesso - Intermediate Italian Lessons - Teaches Italian by taking you on a webquest through Italian websites. Many cultural notes, no sound samples. For intermediate to advanced students. - http://adesso.heinle.com/
Tongue Twisters in Italian - Tongue twisters with English translations. - http://www.uebersetzung.at/twister/it.htm