ChatSecure is a free and open source encrypted chat client for iOS that supports OTR and OMEMO encryption over XMPP.

Web-based XMPP/Jabber chat client written in JavaScript

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

XEP-0384: OMEMO Encryption for libpurple.

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

The | state-of-the-art | secure-by-default | one-touch-deployed | XMPP server for everyone.

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

A WIP secure XMPP client for UWP (Windows 10) devices.

Gajim plugin for OMEMO Multi-End Message and Object Encryption

An experiment in building a better XMPP client. This time using Flutter (mirror)

(M) Android XMPP Client

Officially supported Psi plugins

Implements OMEMO in C.

Tracking the Progress of OMEMO Integration in various clients

Codebase snapshots for Psi+ project

OMEMO Xtra for Adium (packaging the lurch and carbons libpurple plugins)

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

A Dart implementation of the cryptography needed for OMEMO 0.8.3 (mirror)

Desktop Jabber/XMPP client based on Converse.js and Electron

OnionComms is a repository of script to run an onion server and guides to configure client side applications to connect to any onion service that uses the same protocol, therefore, onion communications.