Artha is described as 'handy thesaurus based on WordNet with distinct features like global hotkey look-up, passive desktop notifications, regular expression based search, etc.. Artha may be used as a free open-source replacement to the proprietary WordWeb Pro' and is an app in the Education & Reference category. There are more than 10 alternatives to Artha for a variety of platforms, including Online / Web-based, Windows, Android, iPhone and Linux. The best alternative is GoldenDict, which is both free and Open Source. Other great apps like Artha are Dictionary.com (Free), Lingoes (Free), WordWeb (Freemium) and Power Thesaurus (Free).
Classic Thesaurus is a fast, convenient and comprehensive online thesaurus. It's crowdsourced, meaning it has been built by a community of writers for writers. The synonymic and other associations are suggested, rated and used by its visitors.
This program can look for the definition or translation of a word in existing databases over the Internet or over local databases. It is extremely simple to use. It also contains a GNOME panel applet for that effect.
NextDict is a multi-language dictionary and a collection of the most complete English references for English and foreign language learners. The app can be used completely OFFLINE, absolutely FREE and NO ADVERTISING. NextDict supports POPUP MODE.