Pure Go implementation of the WebRTC API

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

Mumble is an Open Source, low-latency, high quality voice chat software

qTox is a chat, voice, video, and file transfer IM client using the encrypted peer-to-peer Tox protocol.

🚀starRTC，即时通讯(IM)系统，免费IM系统（含单聊，群聊，聊天室，文件传输），免费一对一视频聊天，VOIP，语音对讲（回音消除），直播连麦，视频直播，RTSP拉流，RTMP推流，webRTC服务端，在线教育，白板，小班课，在线会议，视频会议，视频监控，局域网直连（无需服务器），兼容webRTC, 支持webRTC加速，P2P高清传输，安卓、iOS、web互通，支持门禁对讲，可视对讲，电视盒子，树莓派，海思，全志，任天堂switch，云游戏，OTT设备，物联网平台，C语言自研方案，支持二次开发成类微信，类映客等APP，✨万水千山总是情，来个star行不行✨，更多示例请访问：

免费IM系统，IM即时通信消息系统(含一对一文字聊天，群聊，聊天室)，免费一对一voip实时通话，录屏，webrtc服务端，免费直播连麦，互动直播，视频直播，RTSP拉流，RTMP推流，语音对讲，免费在线会议，视频会议等服务端程序，支持物联网平台，✨万水千山总是情，来个star行不行✨

WebRTC plugin for Flutter Mobile/Desktop/Web

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

SIP softphone for Mac

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.

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 full-featured implementation of Mumble for Android devices.

A cross platform pure C# .NET Core library for SIP, VoIP and WebRTC. No native library wrappers required.

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

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

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：

The Open Source Cloud Communications Platform

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

SIP-Based Audit and Attack Tool