VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
VICIdial Contact Center Suite
Web based system for Computer Assisted Telephone Interviewing (CATI)
Open source Fax server software for inbound / outbound internet Faxing
The most affordable CRM system according to Capterra
Unified Communications Server
Enterprise telephony recording and retrieval system
Multi user address book application accessable through the web.
JAvascript Voicexml InterpretER
Cyber-wrt pbx is embedded system in DD-Wrt router
A suite of open-source tools and frameworks for creating SIP apps