Java wrapper for the popular chat & VOIP service
PHP version of Google's phone number handling library
A domain based multi-tenant PBX & voice switch for FreeSWITCH
Matrix reference homeserver
Provide softphone support to AmazonConnect customers
Open-source event-driven AI powered Softphone
Plugin for entering and validating international telephone numbers
A Swift framework for parsing and formatting phone numbers
Issabel PBX - Unified Communications
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Desktop communication tool: chat, telephony, multimedia
VICIdial Contact Center Suite
Remote control software for applications using wi-fi or bluetooth
VoIP/SIP SoftPhone (formerly known as jphonelite)
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP
Open source Fax server software for inbound / outbound internet Faxing
SMS, Fax, Voice Broadcasting and auto dialer Software
Open source CSTA library
ICTCore: Unified Communications Framework for web developers
Software per Call Center