Enable extra functionality for group memberships.
Group Contacts
This module allows you to mark group members as group contacts. These will be shown on the Group page allowing site users to contact those members.
Group members overviews
The default Group member overview is aimed towards management of the group members. This module provides a block and a page with the Group member. There is a separate group permission which can be used to allow users with any group (or site) role to view the members of a given Group Type.