Winpopup Server is designed for those that have little server experience but want to set up their own possibly with an IM client.

The advantage of this is that you can improve communication security and integrity by installing an optional Winpopup LAN Messenger component, the Winpopup Server. The server is an optional component and complements the instant messenger although you could use it for whatever use took your fancy. If Winpopup Server is installed on a network, all Winpopup LAN Messenger clients will discover it automatically, and route all communications through the server. The advantage of this is that all you have to do is instruct potential users to install the message client and the program will do the rest. Winpopup Server supports the following functions i.e. authorization, offline message delivery and communication in complex networks containing multiple subnets. User authorization can be enabled or disabled per administrator decision and the server controls all over authorization so that you can be sure, if it's configured correctly, that there will be no breaches of privacy.

A great server solution although unless it's used with the complementary chat client, you won't get the most out of it.