Browse free open source Telephony software and projects below. Use the toggles on the left to filter open source Telephony software by OS, license, language, programming language, and project status.
Issabel PBX - Unified Communications
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
A simple noise gate app intended for use with VOIPs like Skype.
Unified Communications Server
Java wrapper for the popular chat & VOIP service
A domain based multi-tenant PBX & voice switch for FreeSWITCH
VICIdial Contact Center Suite
PHP version of Google's phone number handling library
Cellular manager for mobile phones/modems
Remote control software for applications using wi-fi or bluetooth
Plugin for entering and validating international telephone numbers
Matrix reference homeserver
Windows tool to read SIM card information and content
The most affordable CRM system according to Capterra
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP