ScoreboardStats Plugin 1.6.2
Features:

mcMMO support
Economy support (required Vault)
Heroes support
Factions support
SimpleClans support
Support UTF-8 characters like the heart Click here:
Many variables Click here:
fully configurationable
PvP can also be displayed on Signs Click here:
Support SQL-Databases
The Player can see his own stats (Kills/Deaths) with the Scoreboard on the right side
You can disable the scoreboard for custom worlds

Download here : http://www.5minecraft.net/