XP Bonus Counter gathers information about experience bonus (in %) character get from quest or killing mobs.
It take in account Recruit-a-friend bonus, equipment bonus (heirlooms) and aura bonus (war mode, boost potions, etc).
Exhaustion stat: addon also display how many x2 experience (rest bonus) player can get if killing mobs.
Lvl - displays current real character level
xpProgress: shows copleteted % of experience
xpLeft: shows how many expierence left to get next level
P.S. I hope lazyman Dejoblue look at my addon code or even take it and add that stats to his addon DejaCharactersStats. Man, I'm still waiting... about 5 years.