Robin W

This Plugin lets you add ranking elements to topics, replies and profiles in bbPress
These appear after the author details on each post and can show any or all of the following in ANY order
Total Topics eg ‘Topics : 78’ – you can set the wording and syntax 
Total Replies eg ‘Replies : 157’ – you can set the wording and syntax 
Total Count eg ‘Total posts : 135’ – you can set the wording and syntax 
Your name for that level – eg ‘ace contributer’ 
Some stars for that level – in the colour of your choice 
An image for that level – you can specify the size.
You can also style and add badges to users, such as ‘Key contributor’

bbp user ranking

This is awesome. Just what I was looking for. Thanks Robin.

Just what I was looking for

For bbPress - Lets you add ranking and badges to topics, replies, and profiles

This Plugin IS NO LONGER MAINTAINED
use https://wordpress.org/plugins/bbp-private-groups/
This plugin displays private forums titles to non logged-in users in main index.
This allows non logged-in users to see that forums exist, but have no acces to these.
If selected by a non logged-in user, the use is sent to a page (determined in settings), allowing the admin to determine what information is given, eg login, registration, text etc.
It also has the options to
display forum content (descriptions) for sub forums
remove the prefix ‘private’ from all private forums
Works with bbpress 2.5.4

Private forums visibility

For bbPress - displays private forums titles and optional descriptions to non-logged in users, and optionally hides the prefix 'private'

bbp user ranking vs Private forums visibility