In this UI Package you'll find the addon(s) and WTF file(s) of:
PowerAuras,
IceHuD,
Macaroon!,
ButtonFacade,
KGpanels,
Quartz,
and a small grid Addon: Align.
These files will provide a sleak HuD UI design. First when I started to play around a HuD UI my goal was to stop looking down at my action bars and get more into the fight, I eventually got so comfortable with looking ahead instead of down I played with Macaroon! to remove the clutter of my Action Bars.
You can see the UI in action here:
http://www.youtube.com/watch?v=qRR30KxnNIM&hd=1
Thanks for your interest.
Vaughn of Cenarius.