VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
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
Cellular manager for mobile phones/modems
Enterprise telephony recording and retrieval system
H.323 Gatekeeper for VoIP and videconferencing
Cress is a comprehensive toolset for graphical service/workflow design
Simple web interface for mapping CDR from VoIP provider to Asterisk
Java VoIP/SIP PBX system (replaced by jfPBX)
JAvascript Voicexml InterpretER
A simple noise gate app intended for use with VOIPs like Skype.
Webface witch extract CDR (Call Detail Records) from MySQL base.
Cyber-wrt pbx is embedded system in DD-Wrt router