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.
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Issabel PBX - Unified Communications
Simply explore your Android phone!
Unified Communications Server
A beautiful SMS messenger for Android
A simple noise gate app intended for use with VOIPs like Skype.
Java wrapper for the popular chat & VOIP service
VICIdial Contact Center Suite
The most affordable CRM system according to Capterra
A domain based multi-tenant PBX & voice switch for FreeSWITCH
Remote control software for applications using Bluetooth or Wi-Fi.
Windows tool to read SIM card information and content
Plugin for entering and validating international telephone numbers
A Swift framework for parsing and formatting phone numbers
PHP version of Google's phone number handling library