For those of you who like to write and who think in mind maps, this application's for you. Type in a word and watch the map blossom before your eyes. Click on a word and watch the new branches germinate in real-time.
A screen shot cannot do justice to the visual elegance of this application. You must try it yourself. Try the words "reason" or "review" and watch what happens. Though less exciting, there's even an entry for "blog ."