That picture has an action bar, minimap, unitframe and panels addon, probably even more. If your not after the Spartan UI, which is the one in the picture, then I don't see how to help.
There is a SpartanUI Fan Update @ wowinterface but that is not without issues due in part with it being taken over by another author after a lack of updates on the orignal.
You could try that out, but it is an alpha release so a work in progress very much.
You can mock up a very satisfying SpartanUI clone using Chinchilla for the minimap, Bartender4 for hotkeys, Shadowed Unit Frames for the player/target/etc, and Minimap Button Frame to handle the various buttons. All four mods are actively maintained. Throw in Chocolate Bar for a good LDB/Broker handler. The risk of a complete-replacement UI, however pretty, is that when the author moves on, it's done.