It's a combination of mods (I'll just list the major ones):

Fubar 3.0 - bar at the top
X-perl unit frames
Prat - for the chat window
Trinity Bars 2.0 - for the action bars
Carbonite - for the minimap/quest tracker
Clearfont - a must for replacing the deaulft font type
eePanels - for the panels you see around the aforementioned mods

Note about the eePanels: I got the idea from seeing the awesome custom UIs in wowinterface.com. However, I'm just using it to create simple panels as I find aesthetically pleasing to separate the major areas of the screen.

So there it is; it's a (relatively) simple interface that I just cobbled together according to my needs. However, I'd suggest going to www.wowinterface.com for full suites/compilations if you don't want to create one for yourself (some of them I found over the top, but very clean for the most part).

Also, I'd like to mention how much I really like Carbonite. I've tried Quest Helper as well, but I just Carbonite to be more flexible as far as quest tracking. The google-style minimap doesn't hurt either :thumbsup: .