icfbPhotoTagging is jQuery plugin which provides you functions you can use to develop photo tagging aplication like facebook have. With this plugin you can view tags, edit tags(positions, sizes), add new tags, view all tags at once, etc…
Best jQuery Facebook Plugins & Tutorials with Demo
Have you even paying attention on facebook ajax loading bar, think it’s simple but really cool, if you using high speed internet connection sure this image won’t show, but I always see it when I share a link on my personal facebook status. If you want to get the the image you can use this ajaxload image generator server, pick the facebook style on the combo box.
A Face detection techniques which is mostly used by social networking sites like facebook.com.