Net Send Messenger
Net Send Messenger is an application that utilizes the net send command built into windows NT/2000/XP to send messages to any computer on the network.

The application uses a database with the display and computer names of all computers on the network.  Then you select the computer to send to, type your message and hit send, and instantly the user(s) have reveived the message.
Current 1.3.2 version download
Contact Info:
Name: Mitchel Sellers