Warning: I could not get any dictionary to work with this program..
http://www.tc.umn.edu/~hoang027/index.html
The only trouble is, I couldn't get it to work. The app itself works but the links to dictionaries are dead. I emailed the author about this, and he sent me a link to wordnet dictionary in .dz format (the only format this app uses). It loaded in the app but when I typed in a few common words to test, it said it can't find them..
I'll update this page if I get feedback from the author.