Content Management System(CMS): PHP + MySQL

This PHP + MySQL CMS allows users to add, edit, and delete content on a website. Includes FCKeditor, a popular WYSIWYG HTML text editor that lets the user customize webpage content (much like MS Word does for the desktop). This application was relatively easy to create with reusable code (notice the similarity between add, edit, delete, view functions that were applied to the Flash UI application).

Using XOAD: A server-side framework with Ajax support

Unlike client-side libraries (Prototype, Spry, Yui etc)which are written in JavaScript, XOAD is a server-side Ajax toolkit written in PHP. Applications in XOAD make server-based PHP functions available to the client-side Javascript interpreter by passing serialized versions of them as JavaScript objects. You can download XOAD supporting scripts at sourceforge.net. There is also a public forum at forums.xoad.org.

Take a look at my online exam, a simple example of an XOAD application that uses a PHP class and a basic php script.
Chat Module using XOAD: It's live - you'll need someone to talk to though

A Simple(no frills)Ajax RSS Feed Reader

A Simple(no frills)Ajax RSS Feed Reader (REST). Coded with PHP and JavaScript... quite a contrast to the RSS Feed Reader I built using the Spry framework! This Ajax application takes a URL for an RSS feed, collects the XML, and lists the titles and descriptions of the news items contained in the feed. To see the steps to creating this application click on features.

XAJAX: php and javascript framework - The Graffiti Wall

To use xajax you just need to register a function (or an object or class method)...then add a call to the function in your HTML or javascript... includes a Javascript object to facilitate the communication between the browser and the server. It can also be used as a Javascript library directly to simplify certain DOM and event manipulations.

CPAINT (Cross-Platform Asynchronous INterface Toolkit): Chat | Google Query

CPAINT is a multi-language toolkit that helps web developers design and implement AJAX web applications with ease and flexibility. It is built on the same principles of AJAX, utilizing JavaScript and the XMLHTTP object on the client-side and the appropriate scripting language on the server-side to complete the full circle of data passing from client to server and back.