Matrix reference homeserver
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Open source auto dialer for voice, fax and SMS campaigns
VICIdial call center optimization tools, monitoring utilities, and per
Open source Fax server software for inbound / outbound internet Faxing
Unified communications framework and REST API for developers
Issabel PBX - Unified Communications
Unified Communications Server
Unified Communications System - PBX System
Asterisk based VoIP pbx appliance
Ein Mumble-Server-Webinterface, das in PHP geschrieben wurd
Accent interfaces and controls systems through goals and policies
ERP, IP PBX, Accounting, CRM, Time tracking, and etc.
http://www.vaakpbx.com
H.323 Gatekeeper for VoIP and videconferencing
SIP Video Multiconference Media Server with WebRTC support.
A command line utility for remote controlling Polycom VVX IP phones