Java wrapper for the popular chat & VOIP service
PHP version of Google's phone number handling library
Software per Call Center
Unified Communications Server
Unified Communications System - PBX System
Guest WIFI and SMS Marketing Kiosk System
Java VoIP Softphone (SIP) (replaced by jfPhone)
A Better PBX For Your Business
Accent interfaces and controls systems through goals and policies
Enterprise telephony recording and retrieval system
H.323 Gatekeeper for VoIP and videconferencing
Cress is a comprehensive toolset for graphical service/workflow design
Java VoIP/SIP PBX system (replaced by jfPBX)
JAvascript Voicexml InterpretER
CMS API Server with web site
A simple noise gate app intended for use with VOIPs like Skype.
Positional Audio Communication for Minecraft with Mumble