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

Voice chat/VoIP solution for unity.

Self-contained proximity voice chat solution for Unity

IP Phone – lightweight SIP softphone for Windows

Tool to check if an IP of a DblTek GoIP is vulnerable to a challenge-response login system, send SMS messages from the system, execute remote commands botnet style, and generate responses to challenges.

FreeSwitch library for DotNet

Spixi is a decentralized, post-quantum secure communications super-app with messaging, calls, file sharing, a crypto wallet, and Mini Apps. Users hold their own keys, self-authenticate cryptographically, and enjoy true end-to-end encryption with no central servers.

Modern .NET Standard client for accessing the Asterisk AMI protocol using async/await and Reactive Extensions (Rx)

Linphone.org mirror for linphone-xamarin (git://git.linphone.org/linphone-xamarin.git)

Voximplant SDK for adding messaging, voice calling, video chat, and live streaming to Unity apps

A toolkit for writing Interactive Voice Response Applications. It requires an ivrToolkit.Plugin of your choice. I recommend ivrToolkit.Plugin.SipSorcery. There are also plugins for Dialogic SIP and Analog but those require a Dialogic driver.

VoIP Realtime routing engine for Yate with billing, Cost-based/QoS-based routing, and load-balancing support.

Unity integration plugin to add 4Players ODIN technology into your game

Sample project for ODIN plugin usage in Unreal Engine 4/5

VOIP features for Nuclear Option

Ordinary solution for Asterisk/FreePBX resilient branch site telephony system

An intelligent SIP phone system built with .NET 8, featuring AI integration and web-based call management with real-time monitoring. Supports voice recognition, call recording, and hangup detection.

MAUI SIP VoIP Client application for Windows/Android/iOS.

Extract VoIP calls from large and numerous pcap files. This repository is only a mirror.

ZimCom is primarily a voice software like TeamSpeak or Discord. It is designed for small communities and can be self-hosted.