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