LootWhore
LootWhore is a small utility that gives you the ability to see who loots in combat.
When someone does, a message will be printed to your specified output frame or chat channel saying "<Some noob> looted in combat."
By default it will output this in /say, in order to configure it to use some other chat channel or a local display, use the /lootwhore command.
/lootwhore output Chat
/lootwhore output ScrollArea Raid
Would make it output to /ra (raid chat), for example.
/lootwhore output Default
Would make it output to your local combat text addon, like MSBT, Parrot, SCT or Blizzards FCT, etc.
This addon only works if people in your raid or group have another Ace2 addon.
For raid groups, it will only notify for the people in the same zone as you.