SharePoint Site User Directory is a very useful user management tool which offers the follwing features:
* Display SharePoint site users in a navigational tree alphabetically, by Organization Unit(OU), by site, or by online status;
* Display whether user has been active in SharePoint within a 5-minute timeframe;
* Define and organize AD properties in customizable tabs (able to add, remove, and rename AD properties/tabs);
* Search for specific users by names;
* Display and print user profile information.