Vigorous Enterprise Messenger is developed especially for enterprise to create private and secure messaging network, running on LAN as well as Internet. It provides features similar to Yahoo, AOL and MSN Messenger programs - including send and receive Message, File or Screen Shot; start Voice or Video Chat ; start multi-user Chat Sessions and more.

The license of this software is Free Trial Software, the price is $19.95, you can free download and get a free trial.