Dictionaries

Collins English Dictionary : English Dictionary
Longman Contemporary English : Longman
Word reference:word reference dictionary
Websters:http://www.websters-online-dictionary.org/
Urban Dictionary:urban dictionary
SMS Dictionary ;SMS DICTIONARY
written sound :http://www.writtensound.com/index.php
Internet slang Words :http://www.internetslang.com/
Free encyclopedia dictionary:http://www.thefreedictionary.com/
Pronunciation dictionary:http://es.forvo.com/languages/en/
English-Greek vocabulary quizes English-Greek