Best translater app for mobile phones !. GT mobile tools is a cool translation app. Features :

- Translation into any language(63 languages supported)

- Translate text files.

- Also Support voice input i.e it can even translate your voice. Supports voice output, i.e, the translated text can be heard. 

* - Play, # - record voice.

This is a very handy and  usefull application (Eg : When you go to foreign countries, this app can act as your translater ).

Note : Application requires internet connection.