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.
Encryption plugin for Pidgin, providing up to 4096 bit RSA encryption using the NSS crypto library from Mozilla. Keys are automatically transmitted and stored, making it very easy to use, but also resistant to man-in-the-middle attacks.
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.
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.
pork, oidentd, iplog and ocd
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.
Gabber is an easy yet powerful Jabber client for GNOME. Jabber is a powerful open source instant messaging system. Jabber allows communication with other networks, such as ICQ, AIM, MSN, Yahoo, and even IRC, but beyond that it has unique features of its
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.
A pidgin plugin that allows user to assign global hotkeys (e.g. Ctrl+Alt+g) for togglling buddy list and reading queued message. When "Toggle List" hotkey is enabled, it makes the buddy list hidden from your taskbar and task switcher (similar to ICQ).
Pidgin Extended Preferences provides additional preferences for Pidgin users. Most notably, it allows you to change the font size of conversation text without changing your theme and to change how quickly or whether the buddy list tooltips appear.
Multiprotocol plugin-based instant messenger for X11 (optionaly support KDE), Windows and MaxOS X.
Kopete is a flexible and extendable multiple protocol instant messaging system designed as a plugin-based system.
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.
A graphical notification plugin for the instant message client gaim. Now hosted at http://plugins.guifications.org/trac
TerraIM is an instant messenger which connects to the AIM and ICQ instant messaging networks using either OSCAR or TOC as the protocol. It uses the wxWidgets toolkit and suports advanced features such as file transfer, logging, and tabbing.
Jarl is a Perl/Tk Client. It strives to provide full functionality with every aspect of the Jabber IM system. It currently supoprts messaging, chat, groupchat, ICQ, AIM, and IRC support.
ReAIM is an AOL Instant Messenger Proxy for iptables-based firewalls. It allows direct connections to be made to hosts behind an address-translating firewall. MSN and Windows Messenger are also supported.
PLEASE NOTE: We moved to launchpad.net! https://launchpad.net/pidgin-advanced-sound-notification This plugin adds sounds for some sound notifications to pidgin (e.g. "Incoming Filetransfer" or "Authentication requested").
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.
Gimli is an Instant Messenger client for the GNOME desktop.
IANAB is a perl-based bot for AOL Instant Messenger (AIM).
This program includes a gui interface and protocol(s) written in Java to be used as a chat program. The primary chat protocol is MSN, but the program is expanable with "plug-ins" that allow other protocols to be added such as Yahoo!, AIM, and the like.
MiniTik is a minimalist AOL Instant Messenger client written in Tcl/Tk. MiniTik evolved directly from Tik 0.75 (the last AOL release) and continues the legacy of the minimalist patch that I started early in Tik's open-source development cycle.
Smiley is a small application that makes it easy to add new emoticons to iChat and iChat AV applications. With Smiley, you can add prebuilt emoticon packs or create your own images and add them easily and quickly.
An AIM bot designed to log all messages sent to your screenname while you\'re logged off. Easily accessible from a configurable webpage. Supports multiple screennames at once.