Dubsar Dictionary Project

The open-source Dubsar Dictionary Project uses Ruby on Rails®,
PostgreSQL, jQuery and jQuery UI to provide a simple yet dynamic
interface to the Princeton University WordNet® data set, containing
more than 150,000 English words and proper nouns. Users can browse or
search using PostgreSQL wild cards and view word inflections,
definitions and synonyms. A draggable custom tooltip displays
extensive metadata for each listed word sense, including lexical
classifications, syntactic adjective markers, frequency counts from a
reference text, generic verb frames, sample sentences and a broad
array of pointers to words related in different ways to a given
sense. The site also features a hosted QUnit integration test suite.
Visit Dubsar:

http://dubsar-dictionary.com/
http://github.com/jdee/dubsar/