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

Conversations is an open source XMPP/Jabber client for Android

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

Web-based XMPP/Jabber chat client written in JavaScript

An XMPP server licensed under the Open Source Apache License.

A modular and portable open source XMPP client library written in Java for Android and Java (SE) VMs

Modern XMPP ("Jabber") Chat Client using GTK+/Vala

MongooseIM is Erlang Solutions' robust, scalable and efficient XMPP server, aimed at large installations. Specifically designed for enterprise purposes, it is fault-tolerant and can utilise the resources of multiple clustered machines.

💬 Instant messaging server for the Extensible Messaging and Presence Protocol (XMPP).

Ncurses based XMPP client

An IRC to other chat networks gateway 🐝

Cross-platform real-time collaboration client optimized for business and organizations.

Miranda NG: Next Generation of Miranda IM

Monal for XMPP (iOS and macOS)

JabberD XMPP Server

(M) Highly optimized, extremely modular and very flexible XMPP/Jabber server

XEP-0384: OMEMO Encryption for libpurple.

Adium is an open source and free instant messaging application for macOS that can connect to XMPP (Jabber), IRC and more.

(M) XMPP client for macOS based on TigaseSwift XMPP library

(M) Public Project of Tigase Messenger for iOS devices based on Tigase Swift XMPP library.