Open Dictionary – ‘a collaborative project to produce a freely accessible multilingual dictionary in every language, with meanings, etymologies and pronunciations with the aid of the Wiktionary project.’

I also like the fun Urban Dictionary concept a lot. Basically it’s a dictionary in which the words are proposed and defined by the users themselves. It’s really fabulositaceous.

The tcpIQ Dictionary add-on is one of those little utilities that could become indispensable.

‘ The tcpIQ Dictionary sits in your system tray monitoring clipboard. When you copy a piece of text into the clipboard, the dictionary ‘opens up’.’