ArkInventory

ArkInventory is a WotLK addon for patch 3.3.5a that provides better functionality to your bags and inventory.

Features:

user-configurable window width and height

separate keybindings for each location for easy viewing

assign items to a category of your choice (overrides the default assignment)

assign categories to the bar of your choice

unlimited number of bars (there are practical limits though before your screen becomes full)

sort each bar differently if required

user-configurable bars per row