Artha - Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up...
Power Thesaurus - Power Thesaurus is a fast, comprehensive and easy-to-follow online thesaurus for writers...
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.
English Grammar Test - English Grammar Test app is an app by Sevenlynx that contains features to help users access a variety of online resources and books to learn by adopting a different way.
GoldenDict - The program has the following features: Use of WebKit for an accurate articles' representation, complete with all formatting, colors, images and links.
Idioms And Phrases - Idioms And Phrases app allows you to enhance your communication and expression skills by reading difficult idioms and phrases.