VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Enterprise telephony recording and retrieval system
JAvascript Voicexml InterpretER
A simple noise gate app intended for use with VOIPs like Skype.
GNU Telephony Services and Applications
Baresip is a modular SIP User-Agent with audio and video support
A plugin for Teamspeak3. This plugin allows you to autofollow a user.