VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Open source CSTA library
High performance, production quality STUN server and client library
ERP, IP PBX, Accounting, CRM, Time tracking, and etc.
SIP softphone
H.323 Gatekeeper for VoIP and videconferencing
SIP Video Multiconference Media Server with WebRTC support.
Implement Screen Pop for Avaya PBX
Microscopic AGI framework.
GNU Telephony Services and Applications
Positional Audio Communication for Minecraft with Mumble
This is a 3G mobile phone based on Andorid OS