Open Source Windows Messaging Platforms

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Java Instant Messenger (or JIM) is an application to allow instant messaging over a network. JIM does not have a centralized server. Instead, users run the server on one of the computers on the network and other users connect to that server.

#aim (pronounced "shame") is a multi-protocol instant messaging client written in C#

Babel IM is a skinnable instant messenger, with plugins for ICQ, AIM, MSN, Yahoo & RSA crypto. All functionality is provided through the plugin interface, so Babel is highly customizeable.

Chat Messenger written in Java using sockets, contains a server-side app and a client-side app connecting to a SQLite DBMS Programmed by a group of Egyptian ITIians from Intake 33 * Sherif Mosa * Yosrah Ibrahim * Mostafa Magdy * Yasmin Abd Elhameed

DumbMessenger is an instant messenger client can be connected with MSN Messenger host. It supports every basic features include file transfer. It is more object-oriented and compact than Gaim, so you can easily understand and improve it\'s source code

This project offers a simple way to communicate within teams inside the same LAN through their development environment eclipse. There is no registration or configuration required. Everyone can start chatting immediately. With tags, messages can be filtered in an easy and understandable way. Using the eclipse extension point mechanism, it is possible to hook into the sending and receiving process and include powerful own features.

The end goal of the FreeMess Project is to produce a cryptographically secure, pseudonymous, cross-platform peer-to-peer Instant Messenger service, piggybacking on FreeNet (http://freenet.sourceforge.net) as a distributed filesystem to hold user data.

Simple Instant Messenger for local networks. Uses multicast and does not require dedicated server. Supports multiple subnets separated by routers.

Galaxium is an multi-session, multi-protocol instant messenger application build for GNOME users. It uses the GTK# and GDI+ libraries as well as the Mono Framework.

Does not work because there is no master server! A P2P Messenger which uses JXTA. It provides secure RSA/AES end-to-end encryption and VoIP-Capabilities.

JIM Instant Messenger is a multi-platform instant messenger that uses the MSN protocol, and is written in the Java programming language.

A instant messenger client for Jabber, focused on small size and small screen footprint.

Simple shoutbox. Used programming language: VB.net Requirements: .NET Framework 4.5.2 or above

MulticastCommunicator is a multicast-based peer-to-peer instant messenger, which allows rapid file distribution, text chat and data exchange within a multicast group, e.g. a LAN. It is written in Java and uses an easily-extensible message chain concept.

OpenYMSG is an open source Yahoo Messenger API implementation. It began as a fork of jYMSG, primarily to upgrade the API. It is intended to get you up and running with a simple Yahoo Messenger client in very little time.

P2PChat is a instant messenger based on Java, JavaFX and direct IP connections.

Private Network Instant Messenger (PNIM) is an open source cross platform instant messaging program. It allows instant messaging without the need for a third party centralised server, such as MSN's. PNIM works across a LAN, or over The Internet.

IPTalk is a LAN messenger for Windows and Linux OS. It allows users to chat, transfer files over LAN. Main Features are: Threaded message broadcasts Chat logging Fast file transfer A great UI

Client for Game Masters (of a RPG) to control a Game session using Y! Messenger Protocol. This allows GM to talk to the whole group, a sub-group (or individual), etc. and helps her to have a centralized GUI, while players can connect normally to Y! Msgr.

SimplissIM is a simple instant messenger for local networks where people want to chat, not tweak their software settings. Automatic presence, no server needed, no list of contact to maintain (people appear automatically), seamless file sending...

A web-based instant messenger client allowing you to connect to supported messengers (AIM, GTalk, MSN, Yahoo) via HTTP (or HTTPS). The Yafumato server connects to the messengers by proxy and provides a web interface, allowing IM access from anywhere.

Argh is an open source multi-protocol instant messenger for Windows. Our main goal is to make it very simple and light, but flexible and extensible.

This is a java based LAN messenger with file transfer support, chat and even a simple LAN game