Kills before level up

[Rexstormclaw]

Hey Everyone

my brother play WoW (yirch.. :P) he have downloaded a mod for the game which gives him a small window showing how many of the current mob he have to slay to level up.. i know it's easy to figure this out yourself.. but it would be cool with such a window..

do any of you know if it exists?

if not.. it definenly is something i could wish that someone made if it's possiple..

-Rex