Translate.Net is free and open source client for many language services available online (translators, monolingual, and bilingual dictionaries). It supports 41 sites, 53 services, 70 languages, more than 4000 translation directions.

Translate.Net will help you to translate words and phrases to and from numerous languages in simple way. This free, open-source software work as client to most popular translating services available online (translators, monolingual and bilingual dictionaries).

Translate.Net contains many features to receive translation easy:
1. embedded detection of input language and intelligent switching of translation direction based on detected language and input language (keyboard layout)
2. history of used language pairs which sorted by last use time
3. system hotkeys (Ctrl+C+C and\or Ctrl+Ins+Ins) allow to activate Translate.Net and easily perform translation from any software
4. support of user profiles (user defined sets of services)

Used language services include:
1. Machine translators - allow translating phrases and sentences. Translate.Net use most popular of them, like Google translator, Yahoo Babel Fish translator, SYSTRAN translator and many others. Note that quality of Machine translation is far from good. You can't translate poem or some complex text, often translation allow to understand meaning of sentence in foreign language but can't replace competent human translations.
2. Bilingual dictionaries - translate words or small sentences, like Merriam-Webster English-Spanish-English dictionary or Google multilingual dictionary and others
3. Monolingual dictionaries - allow to understand meaning of words or sentences, such dictionaries often contains many rare words which not supported by translators\dictionaries. As sample you can check Merriam-Webster dictionary
4. Encyclopedias - gives much more information about terms and things. Translate.Net support only Wikipedia, support of others planned.
5. Other language services like thesauruses, phraseological dictionary, dictionaries of synonyms and dictionaries of antonyms, etc

The license of this software is Freeware, you can free download and free use this word processing software.