Browse on Tor / i2p - Anon p2p Chat / FileTx, Conf / Video VoIP
Open source CSTA library
High performance, production quality STUN server and client library
H.323 Gatekeeper for VoIP and videconferencing
SIP Video Multiconference Media Server with WebRTC support.
Positional Audio Communication for Minecraft with Mumble
PoC: Short Message Service Center (SMSC) over SIGTRAN
TAPI Phone Monitor for Windows