Just my edit of the great Lui v.3
This is a very customizable ui, can change colors of everything, frames, sizes etc. More info on LUI itself can be found here http://www.wowinterface.com/downloads/info14130-LUIv3.html
Random info about the UI:
-The circle on the top of the screen shows and hides the chat, raid, recount, and omen frames.
-I have OUF and Shadowed Unit Frames for player, target, target of target, target of targets target and party frames. SUF is used for target of target, target of targets target, and party frames (i prefer this than OUF party frames while healing only).
-For Elkano's Buff Bars I have the settings to only show buffs you give yourself, during raid i change the filter of the max duration to 30 so it only shows my procs to keep track of.
Elkano's Buff Bars
Mik Scrolling Battle Text
Shadowed Unit Frames