sip

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

Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, IRC and many other useful features.

WebRTC plugin for Flutter Mobile/Desktop/Web

RTSP/RTP/RTMP/FLV/HLS/MPEG-TS/MPEG-PS/MPEG-DASH/MP4/fMP4/MKV/WebM

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.

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

A simple, intuitive, and powerful JavaScript signaling library

Mirror of the official Asterisk (https://www.asterisk.org) Project repository. No pull requests here please. Use Gerrit:

PJSIP project

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

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

🏆 WebRTC - SFU - Simple, Secure, Scalable Real-Time Video Conferences Up to 4k, compatible with all browsers and platforms.

Pluggable WebRTC softphone and communication platform.

SIP softphone for Mac

Routr: Next-generation SIP Server

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

A WebRTC, SIP and VoIP library for C# and .NET. Designed for real-time communications apps.

Ncurses SIP Messages flow viewer

SIPVicious OSS has been around since 2007 and is actively updated to help security teams, QA and developers test SIP-based VoIP systems and applications.

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