pn provides a command line tool that allows users to operate on phone numbers (get validity information, reformat them, or extract numbers from a text snippet), using libphonenumber.

This package provides python-pypresence, a Discord RPC client written in Python.

Dino is a chat client for the desktop. It focuses on providing a minimal yet reliable Jabber/XMPP experience and having encryption enabled by default.

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.

Plugin for libpurple to allow sending SMS using ModemManager.

This module implements XEP-0198: when supported by both the client and server, it can allow clients to resume a disconnected session, and prevent message loss.

Nheko want to provide a native desktop app for the Matrix protocol that feels more like a mainstream chat app and less like an IRC client.

Many matrix features are supported, including user registration, rooms, typing notification, emojis, E2E encryption, and voip calls.

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

Libircclient is a library which implements the client IRC protocol. It is designed to be small, fast, portable and compatible with the RFC standards as well as non-standard but popular features. It can be used for building the IRC clients and bots.

Net::PSYC with support for TCP, UDP, Event.pm, IO::Select and Gtk2 event loops. This package includes 12 applications and additional scripts: psycion (a PSYC chat client), remotor (a control console for tor router) and many more.

Meanwhile is a library for connecting to a LIM (Lotus Instant Messaging, formerly Lotus Sametime, formerly VPBuddy) community. It uses a protocol based in part off of the IMPP draft(*1), and in part off of traces of TCP sessions from existing clients.

Quaternion is a Qt desktop client for the Matrix instant messaging protocol. It uses libqmatrixclient and is its reference client implementation.

Loudmouth is a lightweight and easy-to-use C library for programming with the XMPP (formerly known as Jabber) protocol. It is designed to be easy to get started with and yet extensible to let you do anything the XMPP protocol allows.

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

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.

This module implements support for sending messages in a MUC to affiliated users who are not in the room. This is a custom extension by Tigase to allow push notifications from MUCs to users who are not currently connected.

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).

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.

senpai is an IRC client that works best with bouncers.

Python-nbxmpp is a Python library that provides a way for Python applications to use the XMPP network. This library was initially a fork of xmpppy.

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.

This module implements support for a Encrypted Push Notifications, a custom extension to XEP-0357: Push Notifications.

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

This package provides a fork of libsignal-protocol-c, used by Dino to provide OMEMO support.