This photo was part of Lifehacker's Wallpaper Wednesday on February 8, 2012. I edited the photo in Photoshop CS4 to create the overlapping geeklet image, then I used standard geeklet commands found on this site (time, date, month, day, and battery status) to add to the desktop.
As far as applications go:
I am running Nocturne to get the black menu bar - items on the menu bar only appear when your cursor makes contact with it.
I am running Docker to customize my dock. It allows you to resize, add spaces, make it 3D/2D, etc.
I also use Hyperdock; an application that allows you to resize windows instantly to 1/2 the screen (left or right), the lower half, or full screen. It also gives you window previews from the dock.
If you have any questions, just ask.