A domain based multi-tenant PBX & voice switch for FreeSWITCH
Issabel PBX - Unified Communications
VICIdial Contact Center Suite
Unified Communications System - PBX System
Asterisk based VoIP pbx appliance
Kazoo Live Medium. From Null to a Full Featured PBX on minutes
This Webmin module aids in configuring the Dahdi interface to Asterisk