VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Free, native Windows SIP softphone with HD audio, SRTP encryption
Issabel PBX - Unified Communications
ICTCore: Unified Communications Framework for web developers
Browse on Tor / i2p - Anon p2p Chat / FileTx, Conf / Video VoIP
SMS, Fax, Voice Broadcasting and auto dialer Software
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
Asterisk based VoIP pbx appliance
Accent interfaces and controls systems through goals and policies
SIP softphone
SIP Video Multiconference Media Server with WebRTC support.
Callflow Sequence Diagram Generator
Java VoIP/SIP PBX system (replaced by jfPBX)
Simple and efficient tool for SIP trace filtering