1)   Net Send Lite 2.00
Net Send Lite is a small utility that uses the existing Microsoft Messaging Service to send network messages. With Net Send Lite you can send messages to a specific username or computer name on your network.

 2)   DynaTalk 2.0
DynaTalk is an easy-to-use application that allows you to send and receive text messages on a local network. DynaTalk doesn't require special configuration or dedicated servers.

 3)   PopMessenger 1.61
Use this complete small to large enterprise level instant communication solution to set up instant communication environment on corporate network without having to use dedicated server or third party services. Download your FREE trial copy now!

 4)   SystemView 2.0
Network Monitoring, Send Message, Shutdown manager, Process manager, Reports, Remote Desktop Management, Inventory Management, Internet History, File History, Security management