bbPress.org

Robby, i told you already. I counted 13-14 plugins from here:

Feature Plugins Tracking

not in the WordPress repository. Translated nobody cares about update notifications, etc.
I have no clue what they do on Github, private websites, and why. Beginner User have less chance to know.

You can start with this list. Clean it and set a goal to make all possible to move all plugins to WP repository.

If not possible, well it is GPL. Take code and dont care what original developer thinks.