Open Source Windows XMPP Software

See https://pidgin.im/about/ for more information. Pidgin is an instant messaging program which lets you log in to accounts on multiple chat networks simultaneously. It runs on Windows, Linux, and other UNIX operating systems. Pidgin is compatible with the following chat networks out of the box: AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, MXit, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr. It is written in C and makes heavy use of GLib and GTK+. Finch is a command line instant messaging program. It also lets you log in to accounts on multiple chat network simultaneously, and it is compatible with the same chat networks as Pidgin. It is written in C and makes heavy use of GLib and ncurses.

Psi is cross-platform powerful XMPP client designed for experienced users. There are builds available for MS Windows, GNU/Linux and macOS.

Psi is a cross-platform powerful XMPP client designed for experienced users. Psi+ is a development branch of Psi XMPP client. Previously is was a sort of fork but now just consider it as a space for nightly builds.

Pandion is an open source instant messaging client for XMPP networks. Keep in touch with friends or collaborate with colleagues using Pandion instant messenger. Pandion is designed for ease of use and secure communication.

Miranda NG is a successor of a popular multi-protocol instant messaging client for Windows, Miranda IM. Very light on system resources and extremely fast. Supports Em-LAN Facebook, Gadu-Gadu, ICQ / MRA, IRC Internet Relay Chat, Jabber XMPP, MinecraftDynmap, Omegle, Sametime, SkypeWeb, Steam, Tox, Twitter, and VKontakte. Linux is not a natively supported operating system, but Miranda is known to run on Linux under Wine. PluginUpdater is responsible for keeping your Miranda up-to-date. It checks for updates for all installed plugins and other components like icon sets and langpack regularly (depending on its settings) and performs updating automatically.

climm is a portable, small, yet powerful console based, fully internationalized instant messaging client supporting the current v8 ICQ protocol and XMPP.

It is an instant messaging client. Crony IM has support for some commonly used instant messaging protocols, allowing the user to log into various different services from one application. like LAN, GTalk, Yahoo, Facebook.

Kraken is a continuation of the Openfire IM Gateway plugin, but in a way that works for any XMPP server. It provides a way for XMPP users to log into, and communicate through, their legacy IM accounts such as AIM, ICQ, MSN, Yahoo, and friends.

a jabber (instant messaging) client running atop emacs.

A Jabber client written in C# using the .NET Compact Framework for use on Windows PCs and Windows Mobile PDAs. It is intended primarily to be deployed in a corporate environment where restricting the actions of users is desired.

PL/SQL packages to perform Oracle 11g tasks within a very few number of lines : dump/load LOBs, compute CRC, get Mime Type from a BLOB, send XMPP messages, list directory contents as a table, interact with Twitter,deal with QrCodes, ...

FireFloo is an Instant Messaging Communicator combining the open XMPP standard (Jabber, GMail Chat etc.) with the Echo Protocol for secured Chat and Messaging.

Audible Alerts is a Pidgin (libpurple) plugin to produce notification of an IM audibly. It uses eSpeak, a text-to-speech program, to call out the name of the buddy who IMs you. You can download eSpeak from www.sourceforge.net/projects/espeak

Gaeth is written in Perl Jabber bot for general usage (Google, exchange rates, fortunes, etc.) being developed Just For Fun™.

Jabba is a Jabber client wrote in java/

JabberMixClient is a IM Jabber client for portable devices, based on J2ME;JMC implements all the features of an IM client: contacts/presence management, single/multi user chat, users search, services discovery, GTalk and MSN transport.With 2 gui versions

Plugin for Pidgin messenger that saves your opened conversations at shutdown and restores its at startup.

XPBot or rather Xmpp Php Bot is an extensible, modular and modern XMPP(Jabber) bot written entirely in PHP. XPBot utilizes all major PHP 5.4 and in feature we're gonna probably move our code base to 5.5 version to provide even better user (and developer!) experience. This bot is going to be 100% modular, so you can replace almost every part of the bot. It's of course free to use (even commercial!). Want to know more? Look at our homepage (Work in progress).

This is a less intrusive ajax web chat which uses Ajax, Smack, XMPP. This is the client version Servlet. The backend code should run under Tomcat server. You can use openfire or any other XMPP server as the server, gtalk also.

Akila’ize GChat IM is a free Instant Massager Chat client like Gtalk, Yahoo Messenger and IBM SameTime for Windows. Akila’ize GChat IM allows you to converse with your friends in Akila’ize Language. It is an alternative to Google Talk. Start sending messages in Akila’ize Language to your Google talk/Gmail friends and have fun Speaks out your conversation (Text to speech conversion – Enable/Disable anytime) Simple and Lite weight application

A realtime collaborative mind-mapping project. AmoebaChat allows the user to send and receive chat-style messages in an interconnected graph. This allows for a new way of communicating between parties that hasn't been explored yet.

Boltun is a chat bot plugin for Miranda IM with its own engine.

ButiFree is a project to develop a catalan card game online (called "La botifarra").

This is a xmpp server based on OSGi

This project is a try to write real tiny and fast XMPP/Jabber client for handheld devices, supported by Enlightment Foundation Library. I use Elementary widget toolkit and Iksemel library to make it possible.