It has pretty much everything you need for Raiding and PvP. Any vanity addons, like Atlasloot or whatnot I removed.
It's pretty small on memory, I think it uses 17mb or less. I consolidate addons to do multiple jobs. Example: Weakauras does it's normal warnings, but also does all buffs/debuffs, Combo Points, Anticipation Points, Execute Warning, Low Health Warning, and more.
It has a lot of cool stuff you can't see in screen shots, like 3d animations for every finisher and major cooldown. It also has above nameplate icons for CC in PvP, and a bunch of other frills. I balanced the minimal look by adding other visual effects, so it's clean and doesn't look tacky or cluttered.
The only "hefty" addon is Vudhoo, which I use for Raid frames. You can middle click on a target to focus, left click to tricks, right click to target on the frames. If you want something more minimal, there are certainly other options, and would bring the memory use down to about 13mb.
I just like how Vudhoo changes automatically upon party size, and resizes accordingly.
So, by making the most efficient use of what's there, it does more with less.
Edited by Blacksad on 1/28/2013 4:21 PM PST