WoWInstantMessenger
Give whispers an instant messenger feel.
Mists of Pandaria 
Cataclysm 
The Burning Crusade 
Wrath of the Lich King Addon Details
Expansion
Categories
Developers
Having issues?
WIM (WoW Instant Messenger) is a World of Warcraft WotLK addon which brings an instant messenger feel to communication in-game.
Features
Whispers in their own windows.
Chat in their own windows.
Tabbed windows
Highly configurable.
Download WoWInstantMessenger
Mists of Pandaria
5.4.8
More addons for Mists of Pandaria
Discover other addons that might interest you
Chatter
Lightweight Chat Improvements
Balance Power Tracker
Tracker for Eclipse energy and energy predictions
Analyst
Collects, analyzes and presents information about the virtual economy.
SnowfallKeyPress
Modify key bindings to work on key press rather than key release.
Mapster
Mapster is a very simple world map enhacement addon.
Leatrix Plus
Quality of life improvements to the default user interface.
Collect Me
Displays a list of mounts and pets which the character is missing.
Fishing Buddy
Help with fishing related tasks -- clothing, fish information, etc.