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Tkabber is a Free and Open Source client for the Jabber instant messaging system. It's writen in Tcl/Tk, and works on many platforms (tested on Linux, FreeBSD, NetBSD, Solaris, MacOS X and Windows (2000 and up).

Tkabber is a IM client that provides a Tcl/Tk interface to the Jabber instant messaging and presence service.

Features:

Tkabber provides a Tcl/Tk interface to the Jabber/XMPP instant messaging and presence service.

Tcl/Tk is a graphical scripting language that runs on the Unix, Windows, and Macintosh platforms. The choice of Tcl/Tk for a Jabber client is three-fold:

* it is portable: once you install a Tcl/Tk interpreter on your system, the Tkabber script "just runs" — without having to compile anything;
* it is customizable: Tkabber reads a configuration file when it starts that tells it the settings of various parameters; and,
* it is extensible: the configuration file is actually a Tcl script, so you can replace or augment entire portions of Tkabber (if you're so inclined).

Tkabber is fully-featured:

sessions:

* TCP and HTTP-polling session transports
* XMPP SRV and TXT DNS-records handling
* hashed passwords
* SASL authentication
* encrypted sessions (if you install an optional extension)
* compressed sessions (if you install an optional extension)
* login via SOCKS4a, SOCKS5 or HTTPS proxy
* user-defined hooks for connection establishment and release
* XMPP/Jabber MIME type

messages:

* privacy rules
* signed/encrypted messages (if you install an optional extension)
* file transfers (HTTP, SOCKS bytestream, DTCP and IBB transports)
* groupchat (GroupChat-1.0 and Multi-User Chat conferencing protocols)
* headline messages
* message events
* completions of nick and commands
* hyperlinks
* emoticons
* user-defined hooks for chat window events

presence:

* signed presence (if you install an optional extension)
* avatars
* browsing
* groupchat and roster invitations
* conference room bookmarks
* annotations about roster items
* vCards
* user-defined hooks for presence changes

windowing:

* configurable look-and-feel via a resources database
* unicode
* tabbed/non-tabbed interface
* sound notifications
* nested roster groups
* for Unix: auto-away, spell checking, KDE or freedesktop docking, and WMaker icons
* for Windows: auto-away, and taskbar icons