Avro is free, open-source, and phonetic (you type "ami" to get "আমি").
Here is the truth many people don't want to hear: You may not need Bijoy Bayanno at all anymore.
Microsoft Windows 10 has native Bengali support that is free, secure, and does not require any activation code. bijoy bayanno activation code for windows 10
Windows 10 includes the "Bengali (Bangladesh) - Bijoy" keyboard layout natively.
How to enable it:
Pro: 100% free, works with any text editor (Word, Notepad, Chrome). Con: Does not support old .BNF fonts perfectly.
If Windows 10 is not activated:
If you have an untrusted key or installer:
For organizations:
A common search query is "Bijoy Bayanno free activation code for Windows 10." Here is the reality: