Profanity is a console based XMPP client written in C using ncurses and libmesode, inspired by Irssi.

Chatty is a chat program for XMPP and SMS. It works on mobile as well as on desktop platforms. It's based on libpurple and ModemManager.

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.

qTox is a Tox client that follows the Tox design guidelines. It provides an easy to use application that allows you to connect with friends and family without anyone else listening in.

Bitlbee-discord is a plugin for Bitlbee which provides access to servers running the Discord protocol.

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.

MQTT and MQTT-SN are lightweight publish/subscribe messaging transports for TCP/IP and connection-less protocols (such as UDP). The Eclipse Paho project provides client side implementations of MQTT and MQTT-SN in a variety of programming languages. This package is for the Python implementation of an MQTT version client class.

Pidgin-OTR is a plugin that adds support for OTR to the Pidgin instant messaging client. OTR (Off-the-Record) Messaging allows you to have private conversations over instant messaging by providing: (1) Encryption: No one else can read your instant messages. (2) Authentication: You are assured the correspondent is who you think it is. (3) Deniability: The messages you send do not have digital signatures that are checkable by a third party. Anyone can forge messages after a conversation to make them look like they came from you. However, during a conversation, your correspondent is assured the messages he sees are authentic and unmodified. (4) Perfect forward secrecy: If you lose control of your private keys, no previous conversation is compromised.

This module implements support for a Tigase XMPP extension, Priority of notifications. It is a custom extension to XEP-0357: Push Notifications.

This module implements XEP-0357: Push Notifications.

Some platforms, notably Apple’s iOS and many versions of Android, impose limits that prevent applications from running or accessing the network in the background. This makes it difficult or impossible for an XMPP application to remain reliably connected to a server to receive messages.

In order for messaging and other apps to receive notifications, the OS vendors run proprietary servers that their OS maintains a permanent connection to in the background. Then they provide APIs to application developers that allow sending notifications to specific devices via those servers.

When you connect to your server with a client that requires push notifications, it will use this module to set up a “push registration”. When you receive a message but your device is not connected to the server, this module will generate a notification and send it to the push gateway operated by your application’s developers). Their gateway will then connect to your device’s OS vendor and ask them to forward the notification to your device. When your device receives the notification, it will display it or wake up the app so it can connect to XMPP and receive any pending messages.

Libstrophe is a minimal XMPP library written in C. It has almost no external dependencies, only an XML parsing library (expat or libxml are both supported).

OMEMO-wget is a tool to handle cryptographic URLs, generated by OMEMO, during XMPP-based sessions.

GNU Freetalk is a command-line Jabber/XMPP chat client. It notably uses the Readline library to handle input, so it features convenient navigation of text as well as tab-completion of buddy names, commands and English words. It is also scriptable and extensible via Guile.

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

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

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.

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.

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

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.

Pipeworks is a mod for Luanti implementing 3D pipes and tubes for transporting liquids and items and some related devices. Pipes and tubes can go horizontally or vertically. Item tubes can also be used for sorting items and extracting items from chests or putting items in chests. Autocrafters can automatically follow craft recipes to make new items and can be fed by item tubes. Deployers can place items in the world as a player would. Node breakers simulate a player punching a node.

Mesecons is a mod for Luanti implementing various items related to digital circuitry, such as wires, buttons, lights and programmable controllers. Among other things, there are also pistons, solar panels, pressure plates and note blocks.

Mesecons has a similar goal to Redstone in Minecraft, but works in its own way, with different rules and mechanics.

This Luanti mod provides an API for adding mods (moving entities like animals and monsters), but does not include any mobs itself. To actually add some mobs, a mod like e.g. mobs_animal provided by the luanti-mobs-animal package needs to be enabled.

This Luanti mod provides an API for registering throwable things and throwing things like arrows. However, this mod does not provide an actual arrow and bow, but luanti-throwing-arrows does.

The Luanti mod "basic_materials" provides a small selection of "basic" materials and items that other mods should use when possible -- things like steel bars and chains, wire, plastic strips and sheets, and more.