Browse free open source Telephony software and projects for Windows 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
A simple noise gate app intended for use with VOIPs like Skype.
Unified Communications Server
VICIdial Contact Center Suite
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP
Cellular manager for mobile phones/modems
Java wrapper for the popular chat & VOIP service
PHP version of Google's phone number handling library
Windows tool to read SIM card information and content
Sim Card explorer and decoder
Plugin for entering and validating international telephone numbers
Enterprise telephony recording and retrieval system
Open-source event-driven AI powered Softphone
Modern, AI-Smart, WASTE p2p for ipv4, Tor and i2p + Voice Conference.