Categorize BuddyPress groups using tags. Show a clickable tag cloud above the group listings or as a widget.
Create groups to organize your subscribed users and send them e-mails based on their groups or by user levels, capabilities or usernames. You can also
Acts as Group provides a means for communication on multi-user blogs.
BuddyPress Groupblog extends the group functionality by enabling the group to have a single blog associated with it. Group members are automatically a
WP Sentry allows WordPress authors to grant access to individual private posts to users and groups of users.
Allow group creators to supply external blog RSS feeds that will attach future posts on blogs to a group.
Attach Twitter accounts to a BuddyPress group then aggregate and track tweets within that group.
** Deprecated in BP 1.2. Use http://wordpress.org/extend/plugins/buddypress-group-email-subscription/ ** Gives users the ability to subscribe to email