ArkInventory
Allows viewing of your (and your alts) Bags, Keyring, Bank, Guild Bank, Inventory and Mail items.
Legion 
Mists of Pandaria 
The Burning Crusade 
Wrath of the Lich King Addon Details
Expansion
Categories
Developers
Having issues?
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
Download ArkInventory
Cataclysm
4.3.4More addons for Cataclysm
Discover other addons that might interest you
Scrap
Allows you to sell every item you do not need with a single click at…
Target Nameplate Indicator
Puts a texture on your target's nameplate to make them stand out. Configure by editing…
ShadowedUnitFrames
Improve your boring Blizzard UI with prettier unit frames.
UnderHood2
HUD that you can tweak the way you want.
SellTrash
Sells all your trash to a vendor in one click
xanBuffTimers
A small text based progress bar system for target buffs.
TSM
Backported version of Trade Skill Master (TSM).
OmniCC
Cooldown count for everything.