Hi, I didn't played wow, so i dunno how far these addons are from what you're looking for :
HP curved bar (not maintained any more) :
http://www.lotrointerface.com/downlo...-Palantir.html
DPS/Heal meter :
http://www.lotrointerface.com/downlo..._Analysis.html
Custom action bars :
http://www.lotrointerface.com/downlo...TonicBars.html