• COBUILD Pronouncing Dictionary (University of Bochum) - COBUILD Dicionario de Pronunciación (Universidad de Bochum)
• Newbury House On-line Dictionary- Newbury House Diccionario en línea
• Merriam-Webster's Collegiate Dictionary, 10th Edition - Merriam-Webster's Diccionario Colegiado, la 10a edición
• Webster's New World College Dictionary & Thesaurus - Webster's New World College Diccionario y Tesauro
• British Terms by Ben Bolker - Términos británico de Ben Bolker
• English (gopher with a thesaurus)
• The Jargon Dictionary
• Online Dictionary Database Query (DICT Group: free database)
• OR Online Dictionary
• One-Look Dictionary – Search 50 dictionaries simultaneously
• The Internet Kendo Dictionary
• Oxford English Dictionary (subscription)
• New Oxford Dictionary of British English (free)
• Oxford Language Word Lists (about 25 languages but no translations)
• English-Afrikaans Dictionary
• English-Danish Dictionary
• English-Dutch Dictionary
• English-French Dictionary
• English-Italian Dictionary (2,200 words)
• English-Portuguese Dictionary
• Yiddish Borrowings in English (OED)
• Wordnet English Dictionary and Thesaurus
• Wordsmyth English Dictionary-Thesaurus

Tesoros y otros medios lexicograficos

• Acronyms and Abbreviations
• Acronym Finder (70,000 acronyms)
• Abbreviations of Chemical Compounds
• German-English Acronym Dictionary
• Acronym Dictionary
  
• Banking and Monetary Acronyms

• Homophone Dictionary
• The Anagram Dictionary
• Antonym-Homonym-Meronym-Holonym-Hypernym-Hyponym-Synonym Dictionary of English
• Hypernym-Hyponym-Meronym-Synonym
• WordNet On-line English words in antonym, hypernym, hyponym, meronym, synonym
• Synonym Dictionary of English

• Specialized On-line Thesauri
• Rodman Thesaurus
• Roget's Thesaurus
  • Roget's Thesaurus (NIAID)
    
  • Roget's Thesaurus (Project Gutenberg)
    
  • Roget's Thesaurus (ARTFL Project)
• WWWebster Thesaurus
• The Wordsmyth English Dictionary-Thesaurus
• Plumb Design Visual Thesaurus

• Alternative Dictionaries (Profanity)
• A Little Etymology
• Spell Web See how popular your spelling is on the Web
• On-line Danish-English-Norwegian-Swedish Word Finder (Spellchecker)