This desktop, by AerialSKY, was part of a contest in which the entrants could only use a solid colour for their wallpaper. As far as we're concerned, anyone that can pull of something cool with solid brown deserves to be featured.
The Lonely Legend desktop features a fairly extensive list of tools, themes and icons to make this interface customisation look so unique and seamless. Fonts and icons were changed, Rainmeter (of course) was employed, and applications I've never even heard of were used. For the full rundown, check out the original posting on Flickr.