A domain based multi-tenant PBX & voice switch for FreeSWITCH
VICIdial Contact Center Suite
The most affordable CRM system according to Capterra
Unified Communications Server
Project about FusionPBX on Live Medium
Enterprise telephony recording and retrieval system
Java VoIP/SIP PBX system (replaced by jfPBX)
A complete invoice managment solution for Elastix PBX
Cyber-wrt pbx is embedded system in DD-Wrt router
Asterisk and Yate (VoIP PBX) Scripts and Libraries
CRM system based on vtiger, adapted to Polish companies.