English-Hindi.net - English to Hindi Dictionary (Free). You can get meaning of any English word very easily. It has auto-suggestion feature which will save you a lot of time getting any meaning. We have a Chrome Extension and an Android App
Merriam-Webster - No other dictionary matches M-W's accuracy and scholarship in defining word meanings. Our pronunciation help, synonyms, usage and grammar tips set the standard.
English to Urdu Dictionary - English to Urdu Dictionary is one of the best language learning application which emphasis on pronunciation of difficult words.
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.
U-Dictionary - U-Dictionary is one of the sleekest dictionary applications, which helps in removing the language hurdles for its users and is available in 12 different languages.
GoldenDict - The program has the following features: Use of WebKit for an accurate articles' representation, complete with all formatting, colors, images and links.