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.
msn-proxy is a lightweight transparent proxy used to control/monitor the use of msn messenger clients. support all active protocols (all clients). lots of features.
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.
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.
Scribis is an instant messenger for the ICQ, MSN, Jabber Network. Scribis runs on SkyOS (www.skyos.org) and uses its native UI called SkyGI.
MSN Messenger client for linux
BeGaimed: An Instant Messenger based on Gaim(.sf.net) with the bluetooth capabilaties based on Bemused(.sf.net). Just a messenger for your phone sitting on your sofa using your pc with bluetooth and adsl/cable(or any other internetconnection)
Hobby OS for more practice.
a set of 3d programming utility classes implemnted in C/C++ for use in 3D projects with directX,
An OS-independent multi-protocoll IM client. Any computer setup that supports gcc and fltk should be able to use FIMp. Will support at least ICQ/AIM/MSN. This project is just getting started so there is not much done yet.
FServ for pidgin lets you share your files through any instant messaging protocol suported by pidgin. Just put your files in the shared folder and any buddy can get it.
This project includes 2 parts: the open FPGA+DSP architecture for the GPS hardware and the GPS software running in embedded system and PC
This is a Gaim plug-in. It can block all the MSN smiles we don't want to see, filtering both the sender and the smile itself.
Put very simply, GaimDotNet is basically a project to take Gaim, and turn the client into a Microsoft.Net windows application based on already existing connection protocols.
A MSN IM client with a GTK+ interface. It is designed to be basic and compact but still has a ink message feature for those who like to visually get the message across.
IMinGame is a Windows software for gamers, it updates their IM status with the name of the game they are playing. Currently it supports updating the "Now Playing" status of MSN/Live Messenger (or other IM software implementing the same interface).