The list of users divided by workgroups and domains
You can send messages to the group of computers, just selecting them from the network users list
Ariolic NTPager does not require stopping system messenger service. It's increasing the system reliability, because it's allows you to receive the messages independently of program's current state
Inbox and Outbox History
Reply and Forward message from the Messages History window
Nice and handy interface
Ariolic NTPager works on Windows NT and Windows 2000