A universal instant messaging (IM) program
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.
A smaller, faster, and easier IM client
Miranda IM is an open source, multi-protocol instant messaging client designed to be very light on system resources, extremely fast and customizable. A powerful plugin-based architecture make Miranda IM one of the most flexible clients on the planet.
MSN compatible messenger application
A very nice MSN compatible messenger application, aMSN Messenger is a multiplatform MSN messenger clone. Works pretty much like its Windows based counterpart. Perfect for keeping in touch with those friends who have not yet seen the light. Works on linux
Bot Sentry is a Pidgin (libpurple) plugin to prevent Instant Message (IM) spam. It allows you to ignore IMs unless the sender is in your Buddy List, the sender is in your Allow List, or the sender correctly answers a question you have predefined.
emesene is a platform independent instant messaging client for the Windows Live Messenger (tm) network. emesene is distributed free of charge under the GNU General Public License 2 or any later version.
Licq is an ICQ/AIM clone written fully in C++. It uses an extensive plugin system to manage many different functions including the MSN protocol. The main GUI is written using the Qt widget set.
Fire is a multi-protocol instant messenger client for Mac OS X based on freely available libraries for each service. Currently Fire handles AOL Instant Messenger®, ICQ®, MSN® Messenger, Jabber, limited IRC, Yahoo!®, and Apple Bonjour communications.
Intercepts and parses all instant message traffic received by the computer. A high performance engine allows conversations to be viewed immediately and/or saved for later analysis. NOTE: Requires WINPCAP
MSN/Live Messenger chat client for Linux.
KMess is an MSN/Live Messenger compatible chat client for Linux. The strength of KMess is it's integration with the KDE desktop environment, focus on Live Messenger specific features and an easy-to-use interface.
Gtmess is a console msn messenger client for linux and other unix (POSIX) systems. Apart from the basics (chat windows, file transfers), it offers full unicode (utf-8) support and some advanced features like spoofing the typing user, detection of users that login as invisible etc.
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
Current Track plugin will update your Gaim/Pidgin user info, available message or away message, and buddy icon from iTunes, Winamp, RealPlayer, WMP, Musicmatch, MediaMonkey, XMPlay, Yahoo! & Foobar2000 in Windows and XMMS, Rhythmbox, & Amarok in Linux.
A fork of pidgin which aims to provide minor features that have not been addressed by the pidgin development team (including manual textbox resizing). See funpidgin.sf.net for details.
This is a Jabber Instant Messenger written in Visual Basic 6. This project is dead.
imsniff is a pcap-based instant messaging sniffer. It captures the IM traffic in the network and is able to log conversations, contact lists, profile information, incoming email notifications, other MSN events, etc. Tested in Linux and Windows.
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
AIM Sniff is a network sniffer specifically designed to pick up messages transmitted using the AIM or MSN clients and their derivatives. All information can be sent to STDOUT or a MySQL DB.
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.
Client Tracker is PHP and MySQL based web software designed to help track business clients who pay in check or cash.
Msnm3d is a new approach to chatting. We are trying to integrate a world with the messenger protocol making chatting more fun!
MSN Messenger client for linux
An application Web will be developed to facilitate the communication among teachers and students that are concluding their degree courses, with that they can accomplish consultation of notes, to visualize reports, to alter registers and to fill out forms
A cross-platform multi-service chat and instant messaging GUI client in C++/Qt.
JADEC, it is a GPL, written in Java, its main objective is to automatize at the maximum the merchandize order done by salesmen, to supply whit more agility the information for commercial department and finally to the customers.
An useful foundation class package.