Here is the complete animated shopping cart with php , Ajax  and jQuery.
Fluid & Ajax-enabled jQuery Pinterest Style Grid Layout
jQuery Ajax Loading Overlay with Loading Text and Spinner Plugin
Dynamically Load Content Into A Container with jQuery
Create An Android Holo Themed Loading Spinner with jQuery and Html5
Responsive Ajax Modal Box Plugin with jQuery - Nice Modal
Responsive jQuery LightBox Plugin - ClassyBox
Simple jQuery Calendar and Schedule Plugin For Bootstrap - Bic Calendar
jQuery Plugin For Slim Top Ajax Loading Bar
Simple Ajax Request Plugin With jQuery and PHP - xRequest
jQuery Plugin For Infinite AJAX Scroller - Infinite Scroll
SimpleModal - Beautiful Popup Window Plugin
Minimal AJAX Modal/Lightbox Plugin with jQuery
jQuery Plugin For Smarter Ajax Calls - Smartjax
jQuery Plugin For Submitting A Form with Ajax - FormSubmit
Lightweight jQuery AJAX Loading Spinner Plugin - ajax-loading.js
Minimal jQuery Loading Animation Plugin - Bload
Dynamic Content Loading Plugin With jQuery - ViaJS
Minimal jQuery AJAX Form Submission Plugin - Gdtsubscription
Multi-functional Ajax Enabled Bootstrap Modal Plugin - bootpop.js
jQuery Plugin For Handling AJAX Form Submission - fajax
jQuery Plugin For Dynamic AJAX Bootstrap Modal - loadmodal.js
jQuery Site Search Engine Plugin - Tipue Search
AJAX Page Loader Plugin With jQuery - timed-page-loader.js
Fully Customizable jQuery Tooltip Plugin - asTooltip
Lightweight AJAX Modal Window Plugin In jQuery
Load External Files Into Webpage Using AJAX - jQuery includeHTML.js
jQuery Plugin For Form Validation & AJAX Submission - ssd-form
Auto Send Data When Form Changes - jQuery Quick Autosave
Populate Form With Data Object - jQuery formHelper
jQuery Infinite Ajax Scroll Plugin - ias.js
AJAX Autocomplete Plugin For Bootstrap Select
Populate Form Fields With JSON Data - json-form-binding.js
Create And Handle HTML Forms With jQuery Reform.js Plugin
Load AJAX Content Using URL Hash - hashy-content
AJAX Based CRUD Table Plugin For jQuery - jtable
Fine Uploader - User Friendly File Uploading Plugin
Set The Cursor To Wait During AJAX Loading - jQuery waitforit
Multi-purpose jQuery Photo Gallery Plugin - mbGallery
Populating DropDown With jQuery And AJAX - selectAjax
Inline/Ajax Modal Popup Plugin - jQuery Sunrise
Form Validation & AJAX Submit Plugin - jQuery NiceForm
Versatile Form Validation And AJAX Submit Plugin - jQuery VaSe
jQuery Plugin For Ajaxifying Your Website - Ajaxify
How to Pull Your Google Buzz with jQuery
jQuery UniqueField plugin with Demo
Sweet AJAX Tabs With jQuery 1.4 & CSS3
Pagination with jQuery, PHP , Ajax and MySQL
Delete Records with Color Change Effect using jQuery and Ajax
Flickr Like Title Edit with jQuery and Ajax
jQuery Autocomplete plugin
jRating – Flexible jQuery Ajax Rating Plugin
OpenSocial jQuery Mixi Platform
Dynamically adding form inputs and submit using jQuery
Google Powered Site Search with jQuery
Fun with jQuery Templating and AJAX
TableGear jQuery based application like Excel
Ajax Easy Expand jQuery
FullCalendar with jQuery
jxSlider ajax-loaded content jQuery Plugin
Multiple Ajax Requests with Jquery
Bing Instant Search with Jquery and Ajax
Yahoo Instant Search with Jquery and Ajax
Youtube Instant Search with Jquery and Ajax
XML-to-JSON convertor and remapper with jQuery
How to Easily Make AJAX Style PHP Chat Application
jQuery File Upload Plugin With Drag ‘n’ Drop Support
Fly-To-Basket Effect With jQuery
jQuery Ajax Tooltip
Zurb jQuery Ajax Upload
BeautyTips a jQuery tooltips plugin