Have you heard about Google Transliteration IME ??

Google Transliteration IME is an input method editor which allows users to enter text in one of the supported languages using a roman keyboard. Users can type a word the way it sounds using Latin characters and Google Transliteration IME will convert the word to its native script. It is different from google translator. You may find this facility in online.We can also download it as IME. If you are going for download please select your IME language. Currently they are supporting 8 Indian languages Hindi, Telugu, Tamil, Kannada, Malayalam, Punjabi, Gujarati, Marathi.

It is very useful tool to convert different language pronunciations. For more details goto google IME official site.