If you looking for a Benglai Unicode typing tool you are in right place. TRIVUz Pad is a very handy and simple tool to write bangla. You can type Bengali with Unijoy, Phonetic, Provat easily with this portable version. This Unicode based Bengli tool is free to use from anywhere in the web. For more details check out http://trivuz.com/bangla/?p=4
If you have your own website you can install a button to access it from your web. Just open the installation page and get your code.
Link: http://trivuz.com/bangla/tpp.php