Cool projects (that I happen to work on)

DACCO - The English - Catalan Dictionary Project

A cool, free, open-source, dictionary project for Catlans lerning English and for English speakers learning Catalan. What is particularly nice about it is that it has different dictionaries targeted at the needs of users based on their native language. Its all avalable in XML so it can be transformed into what ever you need and they have a nifty PDF version that you can print out to use as a desk refererence.