The layout of Apple.com is simple and beautiful. Yet, one of the most awesome things about the website is the search functionality. It gives you suggestions (with images) about the several products they offer, making it really user-friendly. Marco has recreated the effect by creating a Fancy Apple.com-style Search Suggestion Plugin.
It makes use of several techniques: MySQL (for the database), HTML/CSS for styling, PHP for retrieving the data and jQuery for the AJAX request. This technique would be great if it were converted to a plugin for a CMS (WordPress/Joomla/Drupal etc.), but also just very cool to have on your website.
Requirements: jQuery Framework
License: License Free