Matrix reference homeserver
Java wrapper for the popular chat & VOIP service
A domain based multi-tenant PBX & voice switch for FreeSWITCH
Open-source event-driven AI powered Softphone
PHP version of Google's phone number handling library
Provide softphone support to AmazonConnect customers
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 wi-fi or bluetooth
Cellular manager for mobile phones/modems
Modern, AI-Smart, WASTE p2p for ipv4, Tor and i2p + Voice Conference.
VoIP/SIP SoftPhone (formerly known as jphonelite)
Desktop communication tool: chat, telephony, multimedia
Open source Fax server software for inbound / outbound internet Faxing
Open source CSTA library
ICTCore: Unified Communications Framework for web developers
Web based system for Computer Assisted Telephone Interviewing (CATI)