WowAce

Version 1:  Basic functionality including a GUI that displays current standings and the ability to manually edit DKP.
Version 2:  Handling whispers, bidding, and detecting and dealing with items.
Version 3:  Handing out dkp automatically at predetermined intervals or predetermined boss kills by name.
Version 4:  Sync with other players with the addon, and a master looter key that prevents other people from fooling around.
Version 4b:  Client version which copies standings and assists in bidding (while still making bidding easy and automated for people without the addon).