» https://custom-writing.org/blog/100-best-online-dictionaries-stock-up-on-new-words-today
» Travlang’s Translating Dictionaries
» Yahoo – Reference: Dictionaries
» Dizionari di informatica e internet, scienze, medicina, tecnologia, economia, sport, religione, di acronimi
» Dizionari in linea – Bucknell University
» Dizionario ipertestuale italiano – inglese
» Dizionari e lessici disponibili presso l’università di Hannover
» German – English On-line Dictionary
» Gaelic Dictionaries Online
» Dizionario inglese – portoghese dell’Universidade Federal do Rio de Janeiro
» English-Chinese Online Dictionary
» ARTFL Project: French-English Dictionary
» Dictionary of Spanish
» Digita Web Garzanti
» Enciclopedia Multimediale delle Scienze Filosofiche
» Focusing on Words
» LOGOS Dictionary Dizionario multilingue che consente di tradurre frasi e parole simultaneamente in venti lingue
» OneLook Dictionaries Ricerca definizioni di parole da diversi dizionari on line
» Voci per un Dizionario del Pensiero Forte
http://dizionari.hoepli.it/ (multilanguage)
http://www.wordreference.com (multilanguage)
http://dizionari.corriere.it/ (multilanguage)
http://www.italysoft.com/curios/dizio-giovani/indice1.html
http://dizionari.repubblica.it/ (italian-english)
http://www.freedict.com/onldict/ita.html (english – multilanguage)
http://www.june29.com/IDP/
http://www.eudict.com/
Interactive Terminology for Europe
http://iate.europa.eu/iatediff/SearchByQueryLoad.do;jsessionid=9ea7991c30d527cfadf0b22241929a3791a467243ee7.e3iLbNeKc3mSe3aNbxuQa3mTci0?method=load
Reference work with 3 million French and English entries in 200 sectors of activity
http://www.gdt.oqlf.gouv.qc.ca/
http://www.ultralingua.com/onlinedictionary/
Excellent bilingual German-English dictionary, generic and technical
http://www.leo.org/leo_home_de.html
Dictionaries, Glossaries, References, Interesting sites listed by sector
Environment
» www.epa.gov/docs/OCEPAterms
Commerce
» www.brint.com/International.htm
Communication
» www.accsystems.com/acc/glossary.html
International Law
» www.findlaw.com/12international/index.html
» www.findlaw.com/search/list.html
» Dizionario di diritto internazionale
Repertories of online dictionaries
» Search Engines — Beaucoup! (Reference/Language/Literature)
Search engine for general and specialised dictionaries
» yourDictionary.com – Home Page
Legal dictionaries
» Dizionario giuridico – Dizionari Simone Online
» Dizionario dell’Unione Europea – Dizionari Simone Online
» Dizionario economico – Dizionari Simone Online
» Dizionario giuridico romano – Dizionari Simone Online
» Dizionario storico del diritto italiano ed europeo – Dizionari Simone Online
» Dizionario del condominio – Dizionari Simone Online
Web dictionaries 
http://www.helsinki.fi/~hkantola/dict.html
Online dictionaries, glossaries and encyclopaedias
http://www.dienneti.it/dizionari/dizionari_linguaggi.htm
Special dictionaries
Acronym dictionary
» Acronym lookup
http://www.glossari.it/dizionarioacronimi.html
» Dictionnaire des synonymes (FRANCESE)
Glossary of the terms most frequently used in the Internet world
» Whatis.com (INFORMATICO INGLESE)
» Webopedia: Online Computer Dictionary for Internet Terms and Technical Support
http://www.lai.com/thc/glossaries.html
http://www.guidapc.com/glossario/
http://unterm.un.org/
Dictionary of petroleum and natural gas terms (Multilanguage)
http://www.pngis.net/dictionary/
Linguistic dictionaries
» Babylon – Dictionary and Translator
http://dictionary.cambridge.org/
» Cliche Finder (INGLESE)
» OneLook Dictionaries (INGLESE)
http://www.merriam-webster.com/
http://www.alphadictionary.com/index.shtml
Encyclopedias
» Encyberpedia.com T By Bob.com
» Encyclopedia.com from Electric Library
» http://www.iep.utm.edu/
Finance
» New York Stock Exchange Dictionary of finanacial terms  termini Finanziari
» www.ideacafe.com/getmoney/finWords.html
http://www.ventureline.com/accounting-glossary/
Photography
» www.reflex.it/enciclopedia.htm
» Kodak professional-Glossary of terms
Gastronomy
» http://www.todine.net/dictionary.html
ISO System Quality
» http://www.iso.ch/iso/en/ISOOnline.frontpage
Computer Science
» The Microsoft Lexicon
» Dizionario di informatica
» Glossario Screen di Internet e di impaginazione
» Dizionario Internet – UNIX della Ripco Communications Inc.
» NetLingo: The Internet Language Dictionary
» PC and Data Communications Terms
» Glossario Microsoft www.geocities.com/Athens/7110/msgloss.htm
http://www.guidapc.com/glossario/
Science and Medicine
» Glossario di termini medici in nove lingue europee
» Glossario di medicina MedicineNet
Tecnology and Industry
Acronyms
» Acronimi e abbreviazioni del WorldWideWeb
» Dizionario di equivalenze tra acronimi tedesco – inglese
» Glossary of Acronyms International Rectifier (IR)
» Thesaurus – Lexico LLC.
NASA Terminology
» Tesauro NASA
and more…
http://bilbo.di.unipi.it/~ato-it/DevGlos.html