This UI provides a clean interface a minimalistic design that doesn't compromise on information shown. Most of the stuff is hidden but it is displayed when it is needed.

In order to do that I also use the following addons: ClassMods, Prat, SCT, SexyMap I also use some code from UnitFramesImproved addon.

My addon: minUI is used for setting the layout and design of every item that is displayed on the screen. The philosophy of this UI is to have every spell on keybinds and know each one of them. This allows to hide the actionbars for more immersion into the world.

Installation:

Backup your current Addons and WTF folder
Copy the contents of minUI.zip to Addons folder
Done

Features:

Low memory usage
Hidden actionbars, use command /ui to display them and configure keybinds
MicroMenu is available on mouseover
Target level is now part of the target's name
Target type is specified by the brackets used: round * normal; square * elite; curly * rare
A range indicator has been added to the left of target
Threat meter moved to the left
Target of target simplified and moved to the right
Player debuffs size increased and shown to the left of player healthbar
Player buffs size decreased and shown below resource bar
Important spell alerts shown to the right of player healthbar
Player cooldown displayed above player healthbar
Player castbar minimized and moved below resourcebar
Alternate resources are displayed above cooldowns (rouge combo points, etc.)
RaidFrames expanded to fit empty vertical space

MinUI