Keep track of your possessions using this free add-on for WoW
Version: 2.02Possessions is an add-on that will help you keep track of all your items and money on all your alts (per server), including worn items, items in your inventory, items in your bank and even items in your mailbox (that you've seen).
Operating System: Mac OS X
In the Possessions window you can then filter the list to show items from
a certain player or a certain location.
The items are grouped together and the tooltip will show you how many you have of that item at each location.
So, if you want to see if you have any silk cloth anywhere... you can just do '/poss silk cloth', and Possessions will show, in its window, all items matching 'silk cloth'. Mouseover that, and you'll see, for example, that you have 10 silk cloth in your bank, 50 silk cloth in your mule's inventory, and 5 silk cloth in your mailbox.
Additionally, Possessions will keep track of items you mail to known alts (so, if you mail an additional 5 silk to your mule, Possessions will an additional 5 silk as being in your mule's inbox, without relogging).