MaterialsTracker 

About MaterialsTracker
MaterialsTracker will keep track of the materials required for your known professions, and keep counts on what are in your bags, banks and mailbox on all of your toons. Simply hover over an item, and if it's being tracked, counts will be shown in the tooltip. (screenshot to follow)

This was inspired by my other addon EnchantingSeller, which has this functionality built-in, however only for the Enchanting professionn.

External Depedencies
External dependencies have been removed. Tooltips are now based on LibExtraTip which is now embedded. You can remove EnhTooltip and Stubby if you do not use Auctioneer.

The tooltip will tell you...
1. how many on you
2. how many in bank
3. how many in your mailbox
4. how many on other toons
5. how many in your guild banks

Usage:
These 3 steps should be completed for each character...
1a. Open each tradeskill and craft frames. MaterialsTracker will record all the materials for the profession.
1b. OR type /mtracker load. MaterialsTracker will record all the materials for your known professions.
2. Visit the bank. MaterialsTracker will record counts of materials stored there.
3. Update your bags. Just move an item in your bags. MaterialsTracker will record counts of materials stored there.
4. Visit your mailbox
5. Visit the guild bank. MaterialsTracker will record counts of materials stored there.

Slash Commands:
/mtracker additem
/mtracker item
/mtracker resetdata
/mtracker tooltips
/mtracker debug

additem - this will allow you to add items to track that are not already being tracked.
item - this will print to the default chat window a breakdown of the items that are held on your other toons.
resetdata - this will erase all of the materials that have been recorded. You should be careful with this one.
tooltips - enable/disable tooltip display. Enabled by default. Can be turned off if this addon is used as a library.
debug - will toggle debug on/off.