WordNet - WordNet® is a large lexical database of English.
Artha - Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up...
WordWeb - One-click lookup in any almost any Windows program; Hundreds of thousands of definitions and synonyms; The latest international English words; Works offline, or reference to Wikipedia and web references.
VerbAce - VerbAce-Pro is an easy-to-use Desktop Translation Software. Translate in a mouse click
TemaTres - TemaTres is a Controlled Vocabulary server. Manage, publish, share use and re-use Ontologies, taxonomies, thesauri, list of values. The open source way to manage formal representations of knowledge
Power Thesaurus - Power Thesaurus is a fast, comprehensive and easy-to-follow online thesaurus for writers...