Artha is a 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.
The Top Words Like website is a great resource for finding synonyms for any given word. More information such as examples and definitions are displayed.
The meaning and definition of 140.000+ words. Meaning Monkey is a free online dictionary. Can't find something? Take part in the enlargement of MeaningMonkey.org! Let's build the world's next favorite dictionary together.
Wiktionary
Advanced English Dictionary is better than other dictionaries, not just because it contains far more words than a conventional paper dictionary, but because it uses a radically new approach to searching for words.
Google Translate
Wordbook is an offline English-English dictionary application built for GNOME using the Open English WordNet database for definitions and the reliable eSpeak for pronunciations (both audio and phoneme).
India
