Google Dictionary was an online dictionary service of Google, originating in its Google Translate service.

WordWeb is an international English dictionary and thesaurus program for Microsoft Windows, iOS, Android and Mac OS X.

dict.cc is a free, multilingual online dictionary. The site's database can also be downloaded and used offline.

Babylon is a computer dictionary and translation program.

Ludwig is a smart translator and linguistic search engine which helps you to find the perfect word or sentence to express your ideas.

StarDict is a free GUI released under the GPL for accessing StarDict dictionary files.

Aard Dictionary is a free, fast word lookup program.