Open Source Windows Chat Software

DC++ is an open source Windows client for the Direct Connect file sharing network. The DC network is a decentralized network, made up of individual servers (hubs) that users join to share files with other members on that hub. Each hub is individually run by a fellow user of the DC network, and may have certain themes to the content on the hub. Hub owners set up rules to regulate their hub as they see fit.

Ares Galaxy is a free, open source BitTorrent and chat program that uses its own decentralized supernode/leaf network. Ares Galaxy has a simple, quick access interface with a built in audio/video viewer. Ares allows you to share any digital file including images, audio, video, software, documents, etc. You may now easily publish your files through the Ares’ peer-to-peer (P2P) network. As a member of the virtual community, you can search and download just about any file shared by other users. The latest versions also support the BitTorrent protocol and Shoutcast radio stations.

The MXControl project aims to create a set of tools to extend and administrate the Chat-channels on the WinMX Peernetwork. Part of this projects are BendMX that adds features to the Chat, and a full featured Chatbot for administrative and other tasks.

To provide Polish translation of all Mozilla.org products...

phpFreeChat is a free, simple to install, fast and customizable chat that uses by default files for message and nickname storage. It uses AJAX to smoothly refresh and display the chat zone and the nickname zone.

Multiprotocol plugin-based instant messenger for X11 (optionaly support KDE), Windows and MaxOS X.

[IMPORTANT] Retroshare is now distributed on Github. Please go to http://retroshare.net to find the latest releases and sources. RetroShare is a cross-platform, secured and decentralized communication system. It lets you to securely chat, share photos, videos, and more with family and friends, using OpenPGP to authenticate peers and OpenSSL to encrypt all communication.

Coccinella is a free and open-source cross-platform communication tool with a built-in whiteboard for improved collaboration with other people.

The Ignition Project consists of several projects, mostly relating to real-time collaboration technologies. There's ignitionServer, a powerful IRCX server for Windows, ignitionLite, an IRCX webchat, and ignitionServices, an IRCX services for Windows.

FMA is a SMS Manager, Mobile Phone Monitor, Remote Control Agent, Phonebook Manager, Organizer, Fun and much more; whatever you want it to be, it is whatever a mobile phone should have :-) (Currently based on Sony Ericsson features set).

A medium plug-in for the Trillian Instant Messaging application that adds support for communications with a Lotus Sametime server.

ZIM is a highly extensible C# instant messaging platform aimed at the small business looking to enhance communication amongst co-workers to increase productivity.

AChat enables you to chat on your local network (LAN). But you can also share entire directories or send specific files, show images to other users and send messages even to users who are currently offline. Everything with full Unicode support.

Milkbone is a GUI instant messaging client written in Perl. It is designed to be compact (190K distribution) and to give users the ability to create powerful extensions and to be completely customizable. Milkbone runs on Win32, X-based systems, and OS X

Multiprotocol plugin-based instant messenger for X11 (optionaly support KDE), Windows and MaxOS X.

Open Direct Connect is a multi-protocol file sharing program that supports the protocol used by Direct Connect ( http://www.neo-modus.com/ ).

PPlayer is a media player offering many amazing features.It combines Podcasts,Streaming and an intuitive music search in a user designed interface. Just started its able to play nonstop music without any input from the user.It analyses the current song..

Ayttm is an instant messenger program, supporting various protocols such as MSN, Yahoo, AIM, Jabber, and more. It is the heir of the Everybuddy project, and aims to continue improving the program and addressing its shortcomings.

HeavyMole is an ambitious file sharing and communication application (P2P). Main features are: advanced UDP based communication protocol, distributed handling of queries, advanced query language, filtering of answers, distributed chat,...

IRC Java client with support of smileys, skins, jython scripting and plugins.

Orkut Alert is a tiny application that runs in the background checking for any new scraps that have arrived in your scrapbook.It reqires you to have a working account at Orkut .

Blogger xml-rpc protocol plugin for Gaim.

A plugin for Pidgin which translates LaTeX code into images in your IM and Chat conversations.

NOTE: This code has not been updated since 2005. Keeping it here for historical purposes. NOTE2: The code will not most probably compile against latest SILC libraries or with latest GTK either. Silky WAS a secure chat client for SILC (Secure Internet Live Conferencing) protocol. The code is written in C and the GUI is implemented using the GTK toolkit. Supported operating systems include Linux and Windows.

OpenCHAT is a 100% HTTP and HTML based chat server written in Java. It has it´s own stand alone HTTP server integrated and does not need any Applet or special software on client side to run on, but only a frames enabled web browser.