Artha ~ off-line Eng. thesaurus with regex search released!

Artha ~ The Open Thesaurus/dictionary based on WordNet, now has regular expressions search feature added to it. Additionally, it has handy features like look-up on hot key press I.e. lookup a word after selecting it and pressing a hot key, suggestions for misspelled words, passive desktop notifications, etc.. This can be used as an advanced replacement to the proprietary WordWeb Pro.