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Adium X a multiple protocol instant messaging client. This is a culmination of a year long rewrite of adium, which now utilizes libgaim (the core part of gaim) to connect to multiple protocols, and is also based on a new plugin architecture. Partial address book integration, cool looking tabs, multiple protocols for instant messaging, and a compact contact list are some of the many features aMSN aMSN is a free open source MSN Messenger clone, with features such as: Display pictures, custom emoticons, webcam support, multi-language support, and more. Read more BoomBot BoomBot is a developer's framework for writing a bot connecting to the AIM network. It manages the network communication for the bots so that they can be easily written without worrying about AIM itself at all. Centericq a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!, AIM, IRC, MSN, Gadu-Gadu and Jabber protocols ejabberd ejabberd is a free and Open Source distributed fault-tolerant Jabber server. It's mostly written in Erlang, and works on many platforms (tested on Linux, FreeBSD, NetBSD, Solaris, Mac OS X and Windows NT/2000/XP). fChat fChat is an instant messaging client with a corresponding server that allows specifically software developers to chat and share code snippets. Fire Fire is a free Instant Messaging client for Mac OS X. It supports the seven most popular Instant Messaging services: AIM, ICQ, IRC, Jabber, MSN, Yahoo! Messenger, and Apple Bonjour. Fire.app Fire.app is a multiplatform Instant Messenger client based off of freely available libraries for each "service". Currently Fire handles AIM, Bonjour, Google Talk, ICQ, IRC, Jabber, MSN, and Yahoo! Pager communication. Gabtastik Gabtastik is WebKit based Site Specific Browser (SSB) for web chat services such as Facebook Chat, Google Talk and meebo. Kadu Kadu is a dynamically evolving instant messenger compatible with the Gadu-Gadu protocol. It can be run on all platforms supporting the Qt toolkit (except Windows). MacArthur MacArthur is an application that lets you set your Away and/or Available status and message in a number of chat clients. It looks up the location and title of the next event in specified iCal calendars, and offers that as the text of your away message (if you want). MSN for Mac OS X offers communication tools, powerful and innovative integrated software, enhanced online security tools, and dedicated Mac Support Nomatic*IM Nomatic*IM provides a service that supports the convenient, and appropriate broadcasting of presence through instant messagin clients. It provides the flexibility to support multiple IM protocols, IM clients, and operating systems. Psi Psi is a cross-platform client for the Jabber instant messaging system. It has support for multiple logins, groupchat, and Unicode. SAPO Messenger Mac SAPO Messenger Mac is a Jabber/XMPP client. TikiTwit TikiTwit auto syncs your Twitter and iChat status. Twitter Twucket is a Twitter client for Mac OS X Leopard. It's designed to use a minimal amount of screen real estate, so you can keep an eye on your Twitter feed in a window small enough to leave open all the time. Twucket Twucket is a Twitter client for Mac OS X Leopard. It's designed to use a minimal amount of screen real estate, so you can keep an eye on your Twitter feed in a window small enough to leave open all the time. XCC XCC is a Hotline client supporting many many features. Centred around the community rather than file transfers.