The following review written by one of the Software Informer contributors applies to version 4.5
Avro Keyboard is an excellent tool that allows you to write in Bangla. The program allows you to set shortcut keys to switch between Bangla and English typing modes. It also offers two Bangla typing methods depending on your knowledge of the language and your preferences.
You can choose English to Bangla Phonetic method, which is the best option for new users, since you type the words in English, based on the pronunciation, and the program shows the symbols in Bangla. The other method is the Traditional fixed keyboard layout, in which you type with keyboard layouts like Bijoy, national,etc. There's also a feature called Avro mouse which shows a sort of keyboard in Bangla and allows you to directly type by clicking on the keys with your mouse.
What is more, the program is absolutely customizable and easy to use, offering the main options in a simple bar that can be moved all over the desktop.
To sum up, Avro Keyboard is a must-have for those who need to write in Bangla, since it is completely customizable and offers multiple options for different skill levels and needs.