MZirc - Free User Friendly Interface IRC Client

MZirc provide you a user friendly interface for use with the Internet Relay Chat network (IRC). A tiny IRC GUI. This software only has some basic features but a beginner will appreciate not getting lost in a lot of options.You can easily select the IRC channel to join and chat away.

MZirc is full configurable and graphic effects like colors, fonts, font-size, backgrounds, margins, text spacing, styles. The pop up font window (ctrl+k) inluding 16 colours (ctrl+e), bold (ctrl+b), underline (ctrl+u), reverse (ctrl+r), strikeout (ctrl+s), and [new] italic (ctrl+i). All chat windows (including status, channels, privates and dialogs) are structured in a configurable and dockable tree view.

MZirc support All 32-bit MS Windows (95/98/NT/2000/XP). This is freeware of software.

Main Features

• full configurable and graphic effects: colors, fonts, font-size, backgrounds, margins, text spacing, styles.
• pop up font window (ctrl+k) inluding 16 colours (ctrl+e), bold (ctrl+b), underline (ctrl+u), reverse (ctrl+r), strikeout (ctrl+s), and [new] italic (ctrl+i).
• http and ftp Hotlinks.
• application icon blink alert when inactive and receive messages to you.
• global irc net view, all known users and chans details using database.
• all chat windows (status, channels, privates and dialogs) are structured in a configurable and dockable tree view.
• notify, ignore and messages log record utilities; using filtering.
• customizable menus and tool bars (main menu, standard tool bar, and 3 user tool bars).
• flood out control, debug logs.
• client-To-Client Protocol (CTCP) (http://www.irchelp.org/irchelp/rfc/dccspec.html)
• direct Client-To-Client Protocol (DCC) Send and Get files, and to Chat privately (http://www.irchelp.org/irchelp/rfc/dccspec.html)
• connections can be stablished through proxy socks servers (versions 4, 4a,5). (uses TipClient component from TurboPower Internet Professional).
• built-in object pascal editor and interpreter (uses a modified verion of JvInterpreter component from Project JEDI's JVCL).You can handle application components and scripting using event handlers.
• expression evaluator /[expression] and Up to 99 customizable user actions using pascal interpreter.
  
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Jfbchat : Free Powerful Java-based Facebook Chat Client without Web Browser

Jfbchat is a small, simple and powerful application specially designed to offer you a Facebook chat client.The client supports Facebook profile photos and audio notifications for incoming messages, useful if you do not want to open the browser to chat with your friends.
Now you possible to sort contacts in groups , Jfbchat planning a search bar for contacts for the next release. It's also possible to see the profile photo of your friends both in the contact list and in the chat window.
A cool sound is now played for incoming and outcoming messages and another important feature is the new preference window where you can configure some options of the client.

The program was developed so that it uses the smack API to manage the XMPP protocol..

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Jfbchat suppoort platform Java, Linux, Linux Console, Linux Gnome, Linux GPL, Linux Open Source, MS-DOS, Unix, Win2000, Win7 x32, Win7 x64, Win98, WinMobile, WinOther, WinServer, WinVista, WinVista x64, WinXP, Other.

phpFreeChat - Free, Simple, Fast, Open Source, Customizable Chat Server

PhpFreeChat is a free and nice working chat. You only have to copy/paste 3 lines of code to make it work. No need to configure a database (Mysql), messages and nicknames are stored in files.
No problems with firewall, this chat is based on HTTP so that you only need a web browser and an internet connection. (everybody can easily chat !)

AJAX technology is used to smoothly refresh (no flicker) and display the chat zone and the nickname zone. Messages and nicknames are stored into a simple filesystem, so that server resources are saved to the uttermost. Bandwidth is preserved because the server never transmits twice the same data : only new messages are transmitted.

You can write your own customized CSS stylesheets, to completely change the appearance of your chat. All chat functionalities are customizable. For example, you can change the messages refresh time, you can ban users for changing their usernames..The plugin system allows you to write your own storage routines. For example, you can write a plugin to store the conversations into your database.
All phpFreeChat commands are inspired by the irc protocol, and its interface is inspired by mIRC and XChat, so that users won't be disoriented.
phpFreeChat is an opensource (LGPL) program, so that you can freely use it and modify it.

Here you can see how to install this chat:
http://www.phpfreechat.net/install.en.html

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KVIrc - Free Open Source IRC Client for Linux, Unix, Mac and Windows

KVIrc is lite IRC client for Linux, Unix, Mac OS and Windows. The software is based on the the excellent Qt GUI toolkit and its code is released under the GNU General Public License. This is free and open source portable IRC client. KVIrc is being written by Szymon Stefanek and the KVIrc Development Team with the contribution of many IRC addicted developers around the world.

This lite IRC client allows you to chat and share information with people from all over the world using a simple and intuitive interface. KVIrc is able to connect to several servers at the same time (optionally with SSL and/or over IPv6). Unicode, ISO-8859, Asian and Windows-native character sets are supported. A special feature is the smart encoding, which allows the user to use 2 encodings at the same time.The chat interface is highly configurable and supports downloadable themes.The channel windows can be split in two subwindows, one for chat messages and the other for commands like joins/parts/mode changes.Every channel, query and DCC Chat is encryptable with Blowfish or AES/Rijndael.

KVIrc has its own scripting language named KVS which can be used to add complex functions a react automatically to network events. The scripting language allows you to enchance the KVIrcs interface and to handle special IRC network features that KVIrc itself is not aware of. Perl and Python can be also used to a certain degree. The SocketSpy feature allows developers to watch the raw communication between client and server.

KVIrc is included in major linux distributions: Ubuntu, Debian GNU/Linux, Gentoo Linux, Arch Linux, OpenSUSE and RedHat/Fedora. Other linux flavors are supported via community contributed binary packages and build scripts. KVIrc is also available for Microsoft Windows 2000 / XP / Vista / 7, Mac OS X and FreeBSD.

Features

Features include on latest KVirc 4.0.4 such as Full GUI Based configuration, MDI floatable windows, Built-in help browser, Themes, Pseudo-transparency, Drag & Drop toolbar editing, Activity Notifier Pop-Up, Status bar with Applet support, Unread text mark, 14 Languages Translations, Proxy support (SOCKv4, HTTP, SOCKSv5), Full IPv6 support (also for DCC transfers), SSL support (also over IPv6), Micryption, Modular architecture: unfrequently used features reside in external modules and are loaded only when necessary, Extensibility (a huge API for writing extension modules), UNICODE, Multiserver connection, Notify lists, Ignore lists, Registered users database, Lag meter, Configurable logging, Standard DCC CHAT and SEND (with resume) support, Extended DCC types( VOICE, RSEND, GET, RECV), DCC CHAT over SSL, DCC bandwidth limit, Built-in scripting language interpreter, scalars, arrays and hashes, aliases, popups, events, scriptable toolbars, Perl support, Ability to translate scripts,emoticons, animated avatars, Objects support in scripting language, etc.

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Spark - Free Open Source Crossplatform IM Client for Business and Organizations

Spark is free, secure, fast, Open Source, cross-platform IM client optimized for businesses and organizations. It features built-in support for group chat, telephony integration, and powerful security. It also offers a outstanding end-user experience with features like in-line spell checking, group chat room bookmarks, and tabbed conversations.

Spark, based on the open IETF standard XMPP (Jabber) protocol is a cross-platform, Java-based Client optimized for use with Jive Software's Open-Source XMPP Wildfire Server.
The Spark API provides a framework for adding extensions on top of the protocol and/or UI of the Spark client. For example, you could write your own message filter or add a button to a chat room and send files using the File Transfer API.

Combined with the Openfire server, Spark is the easiest and best alternative to using un-secure public IM networks. Sparkplugs dynamically extend the features of the Spark instant messaging client. Use Sparkplugs to customize Spark for your business or organization or to add an innovative twist to instant messaging.

Features

Spark features such as Chat, IM, Voice Chat, conference room, spellcheck, ChatManager, SparkManager, Ability to add your own XMPP functions using the SMACK API, SoundManager, Event Handlers, ChatRoomListener, File transfers, ContactListListener, MessageListener, PresenceListener, ContextMenuListener, ContactItemHandler, SessionManager,Components, GaduGadu, IRC, and SIMPLE transports now supported, avatar, note editor, etc.

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Spark is support for Windows ,Linux, and Mac OS. This is freeware.

qutIM - Free Open Source Multi-protocol Instant Messenger Client for Windows, Mac, Linux and Mobile

qutIM is free open-source multiprotocol ( ICQ, Jabber / GTalk / FaceBook / Ya.Online / LiveJournal, Mail.Ru, IRC ) instant messenger. You can even use this qutIM Multi Protocol Client to connect to VKontakte.ru and Twitter. Open Source license is under GNU General Public License, that allow you to download the source code and modified them by yourself. You can help to make it better, for example, with coding, design, testing, etc.
qutIM can be easily customized by every user, including creating personalize soundpacks. Just select a sound for each event in a Sound section of the Configuration dialogue of qutIM. Then, click Export and save .xml file in some folder.

Project began in January 2008 and is under active development. Main goal was to create fast and user friendly ICQ client. Nowadays qutIM provides powerful plugin system for developers, so that it can support any IM-protocol.

qutIM written base on C++ wit Qt 4.4. It will run on most platforms including Mac OS X, Windows and Linux. You can also download the unofficial platform such as qutIM for Mac OSX, Debian GNU Linusk, SUSE Linux, Mandriva Linux and others platform of Operating System.

Features

Multiple accounts, Tabbed and windowed messaging modes, Internationalization support, File transfers, HTTP and SOCKS 5 support, Avatar support,  Adium status icons and animation smiles support, Adium styles for chat window, contact list, theme border, Sound notifications , Conferences, Plugin support, ICQ Protocol X statuses, Anti Spam Filter,Fast and uses little memory,Cross platform, Open source, Permanent development, Text translation function in chat window, and more..

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qutIM working on Desktop platforms:Windows, Linux, MacOS
and mobile platforms: Maemo 5, Symbian. It's freeware.

SLiteChat - Free Open Source Lite IM Client for Second Life

SLiteChat is a completely open source text-only IM/chat client for use with Second Life. Use it to talk to your friends without having to load up all of those heavy graphic goodies. Useful for those at-work times.

Features 

You can now turn off and on the Friends and Groups lists. When logging in, you can now specify your starting sim instead of being forced to rez at your set home. You can either enter a starting SLurl or select “My Last Location” in the drop down on the login screen.

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SliteChat support platform Linux,Linux Console,Linux Gnome,Linux GPL,Linux Open Source,Mac OS X,Win7 x32,Win7 x64,WinServer,Win. It's Free.