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
Modern, AI-Smart, WASTE p2p for ipv4, Tor and i2p + Voice Conference.
VICIdial Contact Center Suite
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP
Java wrapper for the popular chat & VOIP service
Windows tool to read SIM card information and content
Enterprise telephony recording and retrieval system
Cellular manager for mobile phones/modems
Sim Card explorer and decoder
The most affordable CRM system according to Capterra
Open-source event-driven AI powered Softphone
Provide softphone support to AmazonConnect customers
PHP version of Google's phone number handling library