1)   Mobysaurus Thesaurus 1.0.27
Mobysaurus Thesaurus is a comprehensive (30,000+ roots and over 2,500,000 synonyms), feature-rich, off-line English thesaurus that brings the exact word to your mind, serving your everyday speaking and writing purposes - at no cost.

 2)   Mobysaurus 2.4
Mobysaurus is a free, feature-rich English thesaurus and dictionary software that integrates Moby Thesaurus II, Roget's Thesaurus, GCIDE Dictionary and WordNet -- all royalty-free, powerful and most suitable for everyday reference.