GatherCounter is a simple tool for displaying the current amount of selected items in a list, i.e. while farming. You can add nearly( because I haven't tested ^^) all items for observation, from high end pewpew arrows for hunters till the smallest lvl1 poor quality item, as long as it is in your cache which is a restriction made by Blizzard.
I missed a tool like this while farming ores, herbs and relics of ulduar, found none fitting and wrote one. Perhaps there is someone out there who is looking for such a tool, too.

GatherCounter 1.3
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GatherCounter: Visibility can be toggled via /gcount...
GatherCounter: Movability can be toggled via /gcount lock...
GatherCounter: Recentering can be achieved via /gcount center...
GatherCounter: Growing direction can be altered via /gcount up | down | left | right...
GatherCounter: Growing or shrinking of the icons can be achieved via /gcount grow | shrink | normalize...
GatherCounter: Add items to list by dropping them on the plus symbol...
GatherCounter: To add known items manually, use /gcount add itemname or /gcount add [itemlink]...
GatherCounter: Remove items from the list by clicking their symbol...
GatherCounter: To remove all items manually, use /gcount clear...
GatherCounter: This message can be called via /gcount help...