From KGY Soft:
LAN Chat Enterprise(LCE) is designed to support exchanging messages in the regime of real time in a small office, in an educational institution. The program works on the conference principle. You can send private messages to some user and to create private channels for several users. It requires neither connecting to Internet nor a specialized (a selected) server. The program needs only a simple one-range network. The user can take complete control over the program and there's an opportunity to make all kinds of settings to his own liking. It gives each client of the network the opportunity to connect with any of the rest clients of the network to exchange messages on about their projects. Administrators and chiefs can send messages to either individual users or to groups of users, to departments or even to the whole office.