This package provides a C++ library for parsing, formatting, and validating international phone numbers.

Purple-lurch plugin adds end-to-end encryption support through the Double Ratchet (Axolotl) algorithm, to libpurple applications using XMPP,through its standard XEP-0384: OMEMO Encryption. It provides confidentiality, (weak) forward secrecy, break-in recovery, authentication, integrity, deniability, and asynchronicity.

Plugin for libpurple to allow sending SMS using ModemManager.

libqmatrixclient is a Qt library to write clients for the Matrix instant messaging protocol. Quaternion is the reference client implementation. Quaternion and libqmatrixclient together form the QMatrixClient project.

SILC (Secure Internet Live Conferencing) is a modern and secure conferencing protocol. It provides all the common conferencing services like private messages, instant messages, channels and groups, and video and audio conferencing.

This package implements a web-based registration form that validates invite tokens. It also supports guiding the user through client download and configuration via mod_register_apps.

HexChat lets you connect to multiple IRC networks at once. The main window shows the list of currently connected networks and their channels, the current conversation and the list of users. It uses colors to differentiate between users and to highlight messages. It checks spelling using available dictionaries. HexChat can be extended with multiple addons.

mod_invites_api provides an authenticated HTTP API to create invites using mod_invites.

You can use the command-line to create and manage API keys.

This package provides group handling for mod_invites_register

This package provides Ejabberd -- Robust, Ubiquitous and Massively Scalable Messaging Platform. It supports XMPP, MQTT and SIP protocols.

This module implements XEP-0363: it allows clients to upload files over HTTP.

This package provides a unique web page for each generated invitation. Without this module, Prosody will only be able to generate invite links as xmpp: URIs (they look something like xmpp:example.com?register;preauth=29Xbxr91). URIs will only work if the invited user already has an XMPP client installed. This is usually not the case.

This module transforms the URI into a friendly web page that can be shared via any method (email, SMS, etc.), and opened in any browser. The page explains the invitation and guides the user to set up their account using one of a configurable list of XMPP clients (to configure the list, see mod_register_apps documentation).

LibGadu is library for handling Gadu-Gadu instant messenger protocol. The library is written in C and aims to be operating system and environment independent.

gloox is a full-featured Jabber/XMPP client library, written in ANSI C++. It makes writing spec-compliant clients easy and allows for hassle-free integration of Jabber/XMPP functionality into existing applications.

This library implements OMEMO of XMPP (XEP-0384) in C.

This package provides Eclipse Mosquitto, a message broker that implements the MQTT protocol versions 5.0, 3.1.1 and 3.1. Mosquitto is lightweight and is suitable for use on all devices from low power single board computers to full servers.

The MQTT protocol provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for Internet of Things messaging such as with low power sensors or mobile devices such as phones, embedded computers or microcontrollers.

Gajim-OpenPGP is a plugin that adds support for the OpenPGP Encryption to Gajim.

mtxclient is a C++ library that implements client API for the Matrix protocol. It is built on to of Boost.Asio.

GNT is an ncurses toolkit for creating text-mode graphical user interfaces in a fast and easy way. It is based on GLib and ncurses.

Poezio is a free console XMPP client (the protocol on which the Jabber IM network is built). Its goal is to let you connect very easily (no account creation needed) to the network and join various chatrooms, immediately. It tries to look like the most famous IRC clients (weechat, irssi, etc). Many commands are identical and you won't be lost if you already know these clients. Configuration can be made in a configuration file or directly from the client. You'll find the light, fast, geeky and anonymous spirit of IRC while using a powerful, standard and open protocol.

This package provides Zulip's Bot framework.

BitlBee brings IM (instant messaging) to IRC clients, for people who have an IRC client running all the time and don't want to run an additional IM client. BitlBee currently supports XMPP/Jabber (including Google Talk), MSN Messenger, Yahoo! Messenger, AIM and ICQ, and the Twitter microblogging network (plus all other Twitter API compatible services like identi.ca and status.net).

Gajim aims to be an easy to use and fully-featured XMPP chat client. It is extensible via plugins, supports end-to-end encryption (OMEMO and OpenPGP) and available in 29 languages.

Mcabber is a small XMPP (Jabber) console client, which includes features such as SASL and TLS support, Multi-User Chat (MUC) support, logging, command-completion, OpenPGP encryption, Off-the-Record Messaging (OTR) support, and more.