Viewport, a free WordPress theme created by Paul Bennett is focused around a clean and simple, content based layout. The aim is to grab the user’s attention and draw them straight into the content. On the single post page the content is laid out clearly in full, with post controls and a widget-enabled sidebar. The theme also allows the blog owner to change the background image and color, and the image of the ‘Where Next?’ page.
Live Demo : Viewport
Source : SmashingMagazine