Auto Loot Filter is a World of Warcraft addon to allow white- or black-listing of items when looting. This allows you to populate an Item List, and then either only loot items on the list, or never loot items on the list. In order for this to work, you must not use blizzard's built-in auto-looting.
This is my first attempt at an addon, and I found gruv's addon SellJunk very useful helping me figure out how to create and manipulate the item list, so thanks very much to his coding.
To install: Copy the Auto Loot Filter folder to the Interface\Addons directory of WoW
In Game Commands:
/AutoLootFilter or /alf to list all options
/alf list - prints the current item list
/alf clear - clears the current item list
/alf auto - toggles loot filtering on or off
/alf threshold <0-4> - set the loot threshold (0 = grey, 1 = white, 2 = green, 3 = blue, 4 = purple)
/alf usethreshold - toggles using the set threshold when looting
/alf loot - toggles whether the item list is a whitelist or blacklist - if it's on, only items on the list will be looted, if it's off, items on the list will *not* be looted
/alf add <item link> - adds an item to the item list
/alf del <item link> - removes an item from the item list