Our detectives are back with the following intel on this WordPress site
The site is using the P2 theme by Automattic .
We could identify 5 plugins (there might be more) - Google Analytics for WordPress by MonsterInsights , Google XML Sitemaps , tagaroo , WP FollowMe and Wp-Thumbie – Related Posts with thumbnails for WordPress
Blogging at the speed of thought. P2 transforms a mild-mannered blog into a super-blog with features like inline comments, a posting form right on the homepage, inline editing of posts and comments, real-time updates, and much more.
Show user defined number of related / similar posts with thumbnail image