Instant Messenger at office (for LAN or internet)
Server is Php + MySQL.
The administrator can choise all options, for display, contact manage, lock...
Can force nickname to Windows username or let users choise by themself.
He can force or not user to use password, limit (or not) maximum simultaneous users, online users...
Server can be public or locked by password.

Server screenshots :
http://www.theuds.com/images/IntraMessenger_1_EN.gif
http://www.theuds.com/images/IntraMessenger_2_EN.gif
http://www.theuds.com/images/IntraMessenger_3_EN.gif
http://www.theuds.com/images/IntraMessenger_4_EN.gif
http://www.theuds.com/images/IntraMessenger_5_EN.gif

Official forum :
http://www.instanttimezone.com/forum/index.php?c=3&