The BuddyPress notifications widget was suggested by @Reboot in the forum. There is one existing notification widget for BuddyPress but that does not allow multi instance or some other customizations. Reboot suggested to update that widget but when i checked the code, writing a brand new version seemed much better choice & that’s why I am presenting it here today 
Some features:-
- Multinstance, means you can have as many instance as you want.
- Allows you to show/hide the notification count in widget title
- Allows you to show/hide the message showing notification count (please see screenshots)
- Allows you to show/hide the notification list(well, I am not sure if you would like to use that anyway)
- Completely localizable, please use poedit/any other tool to translate
Let us see some screenshots
An an example of output(2 widget instances)
I hope some of you will find it helpful.
Git Repo:-https://github.com/sbrajesh/buddypress-notifications-widget