Social Gallery is The Ultimate Social Lightbox for WordPress. Social Gallery Plugin is a fantastic new way to engage visitors to your WordPress blog by adding the ultimate lightbox featuring social media buttons (Facebook like, Facebook Send, Pinterests ‘Pin it’, Twitters ‘Tweet This’ and now Linked In, Stumble Upon & Tumblr) as well as Facebook or Disqus Comments!
Demo: http://codecanyon.net/item/social-gallery-wordpress-photo-viewer-plugin/2665332