Exploring Words  
   Another advanced English-vocabulary program for long-distance learners of all ages, everywhere.
   http://www.wordexplorations.com/

MT Desk  
   Word lists by medical speciality including Alternative Medicine, Cardiovascular, Dermatology/Skin, and other areas of care.
   http://mtdesk.com/wordlist.shtml

Grandiloquent Dictionary  
   A collection of 2000 words which are often omitted from dictionaries, and are in danger of being eliminated from the English language.
   http://www.islandnet.com/~egbird/dict/dict.htm

MyWordaDay  
   Expand your vocabulary with this free service teaches new words and restores the ones that slipped away.
   http://www.mywordaday.com/

WordGenie  
   An electronic vocabulary enhancement system that runs as a screen saver on your PC computer.
   http://wordgenie.hypermart.net/

Daily Vocabulary Test  
   A new short three question multiple choice quiz every day to test your vocabulary knowledge.
   http://www.zdaily.com/vocabulary.htm

VocabularyMail.com  
   A free daily email broadcast of one to three words, their definitions, and explanations and examples of how to use them effectively in your speech and writing.
   http://VocabularyMail.com/

The Spizzerinctum Page  
   Obscure words in a quiz format that includes .wav files of pronunciations.
   http://www.spizzquiz.net/

International House of Logorrhea  
   A online dictionary of obscure and unusual words and obsolete terms to help enhance vocabulary; over 14,000 English words with brief definitions.
   http://phrontistery.50megs.com/ihlstart.html

Forthright's Phrontistery  
   A site for lovers of obscure and unusual words, featuring a dictionary of rare words, word lists of vocabulary on specific topics, essays and discussions on etymology, vocabulary and language usage.
   http://phrontistery.50megs.com/

Vokabeln.net  
   Web-based vocabulary trainer with a multilanguage interface. Features shortcuts for special characters used in ~100 languages.
   http://www.vokabeln.net/

English Words from Chinese  
   English words which have come into the language from Chinese.
   http://spotlightongames.com/quote/chinesewords.html

Vocabulary Activities for Standardized Tests  
   Interactive activities on word lists based on themes.
   http://www.syvum.com/squizzes/vocabulary/

Commonly Misspelled Words in English  
   Select a reference source and click on any word in a list to get a definition, pronunciation or translation of that word to your language. Take a quiz on spelling.
   http://www.esldesk.com/esl-quizzes/misspelled-words/misspelled-words.htm

Heenan's Universal Dictionary  
   A collection of weird and wonderful words and their alternate meanings; sources, too, where available.
   http://www.wordskit.com/words/

Dave's Choice Words  
   Dave's Choice Words are fun, free vocabulary building exercises.
   http://www.davidfisco.com/dcwindex.php

A Word A Day - Today's Word  
   Audio clip, definition, and example usage.
   http://wordsmith.org/words/today.html