VoiceOne is a Linux distribution that gives you the ability to install a PBX platform with an easy to use Web-based GUI. It also provides a framework for building a communication server adding various plugins. Its main features are Asterisk 1.8 with realtime configuration with MySQL, a Ubuntu 10.04 base, and support for both hard disk and Compact Flash card installation.
Scopserv Communicator is an audio/video Internet phone and instant messenger that supports some of the most popular VoIP and instant messaging protocols such as SIP, Jabber (XMPP), AIM/ICQ, MSN, Yahoo! Messenger, and a whole lot of other useful features. ScopServ Communicator is based on the SIP Communicator softphone.
Newfies-Dialer is a voice broadcast application designed and built to automate the delivery of interactive phone calls to contacts, clients, and the general public. It is scalable from a single server to supporting distributed call processing across multiple cloud-based telephony servers to make millions of outbound calls per day. The multi-user Web interface allows every aspect of the campaign to be controlled with detailed reporting. A Newfies-Dialer Voice Broadcasting Platform is assembled entirely from free and open source components including Freeswitch, Django, Plivo, Celery, and RabbitMQ.