1. Human test for bbPress - Stops spam registration.
2. Show Top posters – Readers with the most postes are displayed on your bbpress forum, with their names (linked to their website if they provided one).
3. Show display name - Uses the display name as set by WordPress for a bbPress moderator’s name instead of the login name.
4. Auto add favourites - Subscribe to thread whenever you have posted a comment.
5. Post notification - Sends an Notification email if there’s a new post to an favorite topic.
6. Moderator new post notification - Sends a notification e-mail to all moderators and admins if there is a new post from a regular member.