Thanks for the rep.
But if you liked Google Transliterate, I have something more too, which is more awesome.
Type in Hindi using transliteration bookmarklet
Using the above link, you can set a bookmark. And
wherever* you want to write in Hindi, just click the Bookmark, and start writing!
Also, when you want to stop writing in Hindi, just click the bookmark again, and it will get disable.
Thanks Google for providing such Awesome features!
*wherever means in any text box on any website. It may not work for writing in Hindi in any other application other than browser, although I havn't tried!