There are many types of how people can communicate over network.
Sometimes you need a huge collaborative system; other times you bet on old remote and reliable protocols; and sometimes you need «just to talk». If you and your interlocutors are all in the same local network, if you want to communicate without any setup difficulties (like installing and setting up servers), but with a certain level of flexibility (much better than the «net send» command), youll definitely like x Chat Free.
Talking about settings, the program «just works»; two computers in the same network with x Chat Free installed can communicate with each other once the installation is finished. No servers, no complex settings, no different «modes» simply install it and talk. But the simplicity in this case doesnt mean the lack of communication possibilities. Besides the plain-text chat, x Chat allows exchanging files and even drawing images on the common board (where all participants of the dialog view and modify the same picture). This capability also includes «screen capture»; thus, you can just tell everything «see it on my screen». The interesting thing is that all conversations can be voiced (the text-to-speech engine would «read» it for you) and, the other way around, you can say something, and the program will convert that into text that you can send.
All outstanding features of x Chat Free are made with respect to network security and reliability; there are mature encryption options and ban lists.