VocabGrabber analyzes any text you're interested in, generating lists of the most useful vocabulary words and showing you how those words are used in context. Just copy text from a document and paste it into the box, and then click on the "Grab Vocabulary!" button. VocabGrabber will automatically create a list of vocabulary from your text, which you can then sort, filter, and save.
A really cool visual dictionary, thesaurus, vocabulary website that gives results as a web/mind-map. Users can click to find different parts of speech, synonyms, antonyms and more.