Our detectives are back with the following intel on this WordPress site
The site is using the Wilson theme by Anders Norén .
We could identify 1 plugins (there might be more) - Yet Another Related Posts Plugin (YARPP)
Wilson is a clean, simple and responsive theme for personal sites and blogs. Features responsive design, retina-ready assets, custom accent color support, custom logo support, custom widgets (video, Flickr and Dribbble), page templates, editor styles and translation-ready code. Included translations: Swedish/svenska, German/deutsch. Demo: http://www.andersnoren.se/themes/wilson/