Italian-Flashcards.com is a fast-loading, useful site for Italian learners to manage and practice vocabulary lists (words and sentences). There are many existing word and sentence lists created by other users that you can snag and use right away. You can also create your own lists and sentences on-the-fly and test yourself until you know them all. As a result, this resource works for Italian students of all levels, beginner to advanced. The self-testing is done via built-in flashcard software that you control.
The website has an integrated dictionary that gives explanations of individual terms and includes examples of how these are used in real sentences. In addition, when you view a sentence, you can scroll over the Italian words and view annotations. NB: You can copy and paste any Italian text you want into the site's Text Analyzer and it provides you with what you see below (see grey scroll-over pop-up in image for annotation). Words that are not in the system with be displayed in grey, such as the word "Mike" below.
Something you might find useful is the site's Sentence of the Day email. This sends a different sentence every day complete with a translation of the sentence.
If you upgrade to a premuim membership (~$5/month) you can also hear audio for the sentence. In fact, the only thing you cannot do without a membership is hear the audio on the site.
Bravo Oliver for this excellent site and keep up the great work!