A domain based multi-tenant PBX & voice switch for FreeSWITCH
Issabel PBX - Unified Communications
VICIdial Contact Center Suite
The most affordable CRM system according to Capterra
Unified Communications Server
Unified Communications System - PBX System
Asterisk based VoIP pbx appliance
Kazoo Live Medium. From Null to a Full Featured PBX on minutes
A Better PBX For Your Business
Enterprise telephony recording and retrieval system
ERP, IP PBX, Accounting, CRM, Time tracking, and etc.
Asterisk and kannel integration
Java VoIP/SIP PBX system (replaced by jfPBX)
VozBox. Asterisk VoIP PBX.
Cyber-wrt pbx is embedded system in DD-Wrt router
Respins of various open source PBX projects
This Webmin module aids in configuring the Dahdi interface to Asterisk