Issabel PBX - Unified Communications
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Unified Communications Server
Java VoIP Softphone (SIP) (replaced by jfPhone)
Free software and hardware for telephony
VoIP/SIP Autodialer
Accent interfaces and controls systems through goals and policies
H.323 Gatekeeper for VoIP and videconferencing
Asterisk and kannel integration
SIP softphone
http://www.vaakpbx.com
SIP Video Multiconference Media Server with WebRTC support.
Callflow Sequence Diagram Generator
Connverts RADIUS acccounting messages to ETSI OSP CDRs