BuddyCircles:- The BuddyPress User Circles plugin is an add-on for BuddyPress. It allows a users to create lists of users, e.g. Family, Close friends, Colleagues etc.
Features
- Allow users to create circles of users(or lists of users).
- Filter activity by circles.
- Circle notifications.
And here is a list of all features for site admins
- Limit circle creation by roles.
- Configure if circle will be a top level tab or be managed under friends component.
- Restrict who can be added to the circle:- Friends or all members.
- Control circle privacy.
- Automatically create default circles for newly registered members.
- Control notifications for add to circle or remove from circle.
- Customize notification emails.