A domain based multi-tenant PBX & voice switch for FreeSWITCH
Issabel PBX - Unified Communications
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
VICIdial Contact Center Suite
Remote control software for applications using Bluetooth or Wi-Fi.
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP
Simple application to capture and report on Mitel SMD data
VoIP/SIP SoftPhone (formerly known as jphonelite)
Web based system for Computer Assisted Telephone Interviewing (CATI)
Software per Call Center
Unified Communications Server
A beautiful SMS messenger for Android
An open source 3GPP LTE implementation.
open5g is an open source implementation of the 3GPP 5G specifications.
Cellular manager for mobile phones/modems
Frontend for ModemManager 0.6/0.7, Wader and oFono
Java VoIP Softphone (SIP) (replaced by jfPhone)