VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Open source Fax server software for inbound / outbound internet Faxing
SMS, Fax, Voice Broadcasting and auto dialer Software
ICTCore: Unified Communications Framework for web developers
Unified Communications Server
Unified Communications System - PBX System
Java VoIP Softphone (SIP) (replaced by jfPhone)
Free software and hardware for telephony
High performance, production quality STUN server and client library
Kazoo Live Medium. From Null to a Full Featured PBX on minutes
AstCDR
Accent interfaces and controls systems through goals and policies
Asterisk and kannel integration
http://www.vaakpbx.com
H.323 Gatekeeper for VoIP and videconferencing
SIP Video Multiconference Media Server with WebRTC support.
Callflow Sequence Diagram Generator