Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)

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WebRTC plugin for Flutter Mobile/Desktop/Web

🚀 An open-source alternative to Twilio.

Async PHP client/server API for the telegram MTProto protocol

Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms -

A simple, intuitive, and powerful JavaScript signaling library

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.

SIP softphone for Mac

开源的即时通讯(野火IM)系统

Baresip is a modular SIP User-Agent with audio and video support

HOMER - 100% Open-Source SIP / VoIP Packet Capture & Monitoring

Routr: Next-generation SIP Server

Linphone.org mirror for linphone-android (https://gitlab.linphone.org/BC/public/linphone-android)

PJSIP project

SIPVicious OSS is a set of security tools that can be used to audit SIP based VoIP systems.

Linphone is a free VoIP and video softphone based on the SIP protocol. Mirror of linphone-iphone (git://git.linphone.org/linphone-iphone.git)

Generic library for real-time communications with async IO support

iOS CallKit framework and Android ConnectionService for React Native

A real-time communications, cross platform, C# .NET Core library for all your SIP, VoIP and WebRTC needs!

Dockerized FreePBX 15 w/Asterisk 17, Seperate MySQL Database support, and Data Persistence and UCP

A full-featured implementation of Mumble for Android devices.

一对一voip视频聊天，直播连麦，多人视频会议，在线会议web演示：

Advanced repeater system software with EchoLink support for Linux including a GUI, Qtel - the Qt EchoLink client

Pentesting framework using Node.js powers, focused in VoIP.

SIP-Based Audit and Attack Tool