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/