Web based system for Computer Assisted Telephone Interviewing (CATI)
Unified Communications Server
Cellular manager for mobile phones/modems
High performance, production quality STUN server and client library
VoIP/SIP Autodialer
Enterprise telephony recording and retrieval system
H.323 Gatekeeper for VoIP and videconferencing
A Discord BOT using Discord.js
Cress is a comprehensive toolset for graphical service/workflow design
A command line utility for remote controlling Polycom VVX IP phones
Java VoIP/SIP PBX system (replaced by jfPBX)
An administration web interface for Mumble VoIP servers in PHP
GNU Telephony Services and Applications