Lingoes
Free
Lingoes is a single-click multi-lingual translation software program released as a freeware translation utility.
TheSage
Free Personal
TheSage is an online English dictionary and thesaurus.
Artha
Open Source
Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up, passive desktop notifications, regular expression based search,…
Aard Dictionary
Open Source
Aard Dictionary is a free, fast word lookup program.
Compare WordWeb with alternatives
Compare Aard Dictionary and WordWeb and decide which is most suitable for you.