NeuChat

From Neunet Solutions:

Add secure real-time communication to your site or intranet, for users within or outside of your firewall. NeuChat is a powerful java chat server that can run in any Web browser. Users can set preferences such as: enable time stamps, choose font styles/colors, and navigate through various chat rooms, all from the same interface. Accessing NeuChat is role-based and determined by administrators. Admins can securely manage chat rooms and users by monitoring all rooms in real-time, logoff users upon demand, ban IP/Hosts from entering chat rooms, and create new rooms quickly and easily using the browser-based admin interface.