Records how long you have had an item and displays it in your bags/bank and/or tooltip. Stacks of equal items will have separate ages. New in this release is notes on items.

New in v0.06:
[added] Notes on items
[fix] Bugfix in database clean-up

The addon
I made this addon because my bankers are always loaded with items and I loose track of how long I have had the different things in my bags. Basically, this addon adds a new number to every item-icon in your bags and/or bank (selectable) denoting how long you have had the item. That's basically all there is to it.
The beauty of it is that the data persists even if you put the item up for auction. When you get the unsold item back, the age will still be correct. This even works on equal items. Say you have two stacks of some leather - this addon may put different ages on those. So if you have 20 equal items in your bags/bank, they may all still have different ages, and this addon will track it.
This feature also works if you send an item to an alt and then send it back. The age will still be correct. (If you leave the item at your alt for weeks, the data may be erased)

Notes
New in version 0.06 is notes. First you must set up a shortcut-key in "Key Bindings". Then, when you mouse-over an item, press the designated key and a dialog will open where you can enter a note. This note will display in tooltips.

Supported items
Most items in WoW is trackable. However, items you have bought from a vendor will basically never be trackable. This is due to how WoW generates the items. A vendor-bought item will be generic and undistinguishable from another vendor-bought item.

Options
There are not many options available, since it basically works directly out of the box. The age-displays can be switched on or off in your bags or bank by typing "/age bags" or "/age bank". This will only toggle the display itself. If all is switched off, it will still register when new items are added to your inventory.
ItemAge can also be assigned a key so you can press a key to show/hide the display whenever you want to check the ages. This is very handy for non-banker toons, and can be assigned from WoW's standard key-binding interface.

Guild bank
Guild bank is a problem in WoW. ItemAge works by using an internal facility in WoW, and guild-banks does not support this facility very well. For some items (VERY few), the guild-bank will retain this information. For all other items, it will not show an age in the guild bank. This is unfortunate, and can not be helped with the current version of WoW. However, the guild-bank does not discard the information, and by moving the item to your bags, the information will reappear.

Stacks of items
Many items are stackable, like leather and cloth. If you already have a stack that is not full and you receive one more item, WoW will merge the new item into your old stack. The "new" stack will be registered with the age of the old stack.
This is particularly important to notice when retrieving unsold items from ther AH and you already have a half-full stack in your bags of the same item.

Commands
Type "/age" for a brief list. The commands are:
/age bags -> Bag-display on/off
/age bank -> Bank-display on/off
/age gbank -> Guild-bank on/off (note that guild-bank does usually not show anyway because of WoW's handling of these items)