Venta4Net is a network fax and voice messaging solution that allows sending and receiving faxes and voice messages from any networked computer (client) via a modem (or modems) installed in the single computer (server). It is a shareware voice message sending application that's advanced and light on system resources.
Here are some screenshots to illustrate the features and user interface of this application:
Viber for Windows
LINE
TeamSpeak Client
Jabra Direct
PhonerLite