MetaHud 

This addon adds a HUD to your UI, showing all the information normally displayed by the Player and Target frames and more.
Always thought it was a shame that Drathal's HUD was given up on the way it was so, I have taken the core of that code and MetaMorphed it.
Added some features which I thought were pretty useful, and removed some of the excess stuff. Decided to release it, as no doubt there are others who enjoyed this as much as me.
Full credit to the original author of course, for the initial code.

Features:
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Health/Mana Bars colour levels.
All Bars are animated.
Shows Level, Name, Class and Elite/Boss, Pet, NPC.
4 Alpha Settings for: Combat/Target selected/No Target/Player is regging.
4 Displaymodes for Health/Mana.
Many positioning and Scaling Options.
Hide Blizzard Player/Targetframe.
Target Menu with Leftclick on Targetname.
Player Menu with Rightclick on Playername.
Castingbar with Cast-time.
Option to hide Petbars.
Option to hide Targetbars/Text.
Load-on-Demand configuration display.
Target's Target display - click to switch to that target.
Aggro alert - audible and visual warnings.
Target PvP status.
Self PvP status.
Status icons for Rested, Combat, Raid leader, and Loot Master.
Target distance display.
Support for Mobhealth, Mobinfo2, and Mobhealth2.
FlightMap support.
FuBar_ToFu support.
myAddons Support.
FuBar Support.

See included Readme for patch history.