AJAX, atechnology that lets you updtae poru\tions of your page without reloading whole page works wonders in interactivity. This collection of jQuery Plugins based on AJAX will help you incorporate the flexibility of AJAX through the ease of jQuery into your web pages.

1. Flower Bubble

Takes a jquery-object, places a div over it or the rest of screen, therein places a container (bubble) with another image (flower) and hides everything later on. The overlay-div can have a transparent background or image. they are not click- or dragable. images are being preloaded. Nearly everything can be customized thru given options, where at minimum you should supply your bubble and flower image. an example on how to call it is included in the js-file.

2. FlexBox

FlexBox is a jQuery plugin that is intended to be a very flexible replacement for html textboxes and dropdowns, using ajax to retrieve and bind JSON data.

It can be used as a:

    * ComboBox, with per-result html templates
    * Suggest box, like Google's search
    * Data-driven type-ahead input box

3. Facebox

Facebox is a jQuery-based, Facebook-style lightbox which can display images, divs, or entire remote pages. It's simple to use and easy on the eyes. Download the tarball, view the examples, then start enjoying the curves. 

4.  Auto Complete

Takes input from the user, and creates a drop down with words similar to the input given.

5. AjaxQ

AjaxQ is a jQuery plugin that implements AJAX request queueing mechanism.

6. ajaxpager

ajaxpager is a jQuery UI widget plugin for building javascript pagers quickly and easily. Each page’s content can be from either a ajax request, a url (iframe), string, element inside the pager, or element outside the pager.

7. Ajaxify

jQuery Ajaxify can turn any link or form from a standard request to an AJAX request. The main difference when compared to most implementations is that the submission button (or image) is also sent with the ajax request. Simple call $('form').ajaxify() should be sufficient in most cases.

8. AjaxFilter

This tiny plugin provides a registry for different filter functions to sanitize ajax responses.

9. Ajaxel

Send a file via ajax request? it's possible.
Send simple ajax request, send form...
Try the simplicity of this plugin.

10. Ajax Tooltip script

This script enhances the default "title" attribute of HTML so certain tooltips can instead get their contents from an external file, with rich HTML content and all. Integration is easy and non obtrusive, and for the sake of efficiency, the script will only use Ajax to load the tooltip's content the very first time the user rolls over the attached element.

11. AJAX Terminal

jQuery plugin to create a web-based console-like behavior that posts user input commands to an AJAX server, and prints the result text. Designed to be utterly simple and highly customizable.

12. Ajax Scroll

AjaxScroll is an lightweight jQuery plugins . Provided the ajax scollpane to replace the Next/Previous buttons, behaviour similar as MSN Image Search(Live.com Search).

13. Ajax Queue

Ajax Queue is a plugin that helps to manage Ajax race conditions. When multiple Ajax requests are made in rapid succession, the results can be returned out of order. This can cause weird behavior in your application. Ajax Queue is a plugin (actually, 2 plugins) that provide a way to manage these requests. This plugin was written by John Resig and is maintained by Mike Hostetler.

14. Ajax Multi Image File Upload

Ajax driven image file upload with thumbnail view and delete function.

15. Ajax File Upload Plugin

AJAX Upload allows you to easily upload multiple files without refreshing the page and use any element to show file selection window. It works in all major browsers and starting from version 2.0 doesn’t require any library to run (although it will use some jQuery functions if it’s already loaded on the page). AJAX Upload doesn’t pollute the global namespace, so it’s compatible with jQuery, Prototypejs, Mootools, and other JavaScript libraries.

16. Ajax feedback using delay callback

This small plugin will let you do the same "loading..." as gmail does.

17. Ajax Broken Link Checker

This module checks your links on the current page by requesting them and reading the server response. If the server returns 200 OK the link gets 'active' class, if other header - the link marked as inactive.

18. Ajax Manager (block, abort, queue, synchronize)

Helps you to manage Ajax requests and responses (i.e. abort requests, block requests, order responses).

19. Add To List

Dynamically add a new option to a select list. A customised form (which you specific) is ajax submitted. A successful ajax return adds the new item to the select list.  A very customisable plugin that hooks into select lists. An 'open-form' event or trigger value display a form (any dom element you specific, that contains a <form>). AddToList will then ajax submit the form, and if it's successful, and a new item to your list.AddToList also promotes accessability by providing support for keyboard shortcuts such as `esc` to close a form.

20. ActionScript Style External Script Loading / Importing

An ActionScript 3.0 ActionScript Style External Script Loading / Importing with a folder simulated NameSpace like ActionScript with the ability to add firebug console logging, onBefore, & onAfter handlers.

21. $.EditableAreas

This plugin allows you to convert parts of the page into editable areas, just click on them and when you finish editing click outside. If you convert an inline element (h1...h5, p ) with this script, the line breaks will be disabled.