Wondering what add-on this is

I have seen this add-on in numerous PvP videos but can never seem to figure out what it is.http://img85.imageshack.us/img85/1088/addonquestionog3.jpgThe add-on in question is the part circled in blue.  I took a snip from a PvP video and it seems to track your opponents abilities and put a cooldown button+timer on your screen.  It also reminds you when their cooldown is up "Whoever's Counterspell is up - WATCH OUT"Any information on this would be greatly appreciated.-Kero