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The jQuery Cross-Domain Ajax Guide
Ajax requests to third party websites are normally not possible because of security restrictions. But there are several client-side techniques to work around this restrictions. This is very interesti ...
Loading external content with Ajax using jQuery and YQL
Tutorial and live examples of loading external content (on other domains) with Ajax in jQuery.
Ajax dynamic content
Free Ajax load content script from DHTMLGoodies.com
PHP Example AJAX Live Search
Free HTML XHTML CSS JavaScript live search, where you get search results while you type.
amCharts: Pie & Donut (Doughnut) chart
2D/3D Pie or Donut animated flash chart. Using it, you can easily have good-looking, animated pies or donuts on your website.
Tutorials, demos and projects in Ajax (XMLHTTPRequest) Programming
This simple script use Ajax (Asynchronous JavaScript and XML) to allow all the links on your web pages to be automatically checked for of bad links.
RSS/Atom feed parser
Loads, processes, and displays RSS and Atom feeds.