VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Open source CSTA library
Browse on Tor / i2p - Anon p2p Chat / FileTx, Conf / Video VoIP
High performance, production quality STUN server and client library
Enterprise telephony recording and retrieval system
ERP, IP PBX, Accounting, CRM, Time tracking, and etc.
H.323 Gatekeeper for VoIP and videconferencing
SIP Video Multiconference Media Server with WebRTC support.
Microscopic AGI framework.
Fast CGI-based AsteriskPBX cluster administration tool.
GNU Telephony Services and Applications