WowAce

This addon helps you to identify what are the classes of your opponents in arenas. This is some kind of Score frame replacement for arenas, since the blizzard one is only available at the end of the arena. Simply target or mouseover an enemy while inside of an arena adds his class and name to a draggable and resizable frame. The class and names are colored with the class associated color (druid=orange, priest=white etc). Of course you cannot detect who are your opponents before the arena starts. Also, when an enemy dies, his name is greyed, and recolored if detected alive later (FD, resurrection, ...)

Infos are shared and synced to other users of this addon using the addon channel.

Clicking on a name in the frame announces on the /BG channel infos about the clicked name and click on the little icon on the left to target him.