Free, native Windows SIP softphone with HD audio, SRTP encryption
Issabel PBX - Unified Communications
Browse on Tor / i2p - Anon p2p Chat / FileTx, Conf / Video VoIP
Unified Communications Server
Unified Communications System - PBX System
Java VoIP Softphone (SIP) (replaced by jfPhone)
This is a PBX dashboard showing the peer,queue,agent at real time
VoIP/SIP Autodialer
Accent interfaces and controls systems through goals and policies
Java VoIP/SIP PBX system (replaced by jfPBX)
Baresip is a modular SIP User-Agent with audio and video support
This project has been relocated to http://github.com/sippy/rtpproxy h
A suite of open-source tools and frameworks for creating SIP apps