Flex is a cross platform framework used in the development of Rich Internet Applications (RIA’s). Here is an overview of Flex Builder 3

PHP-GTK is a combination of PHP, a scripting language available to most major operating systems, and GTK, a set of libraries used to create GUIs

SWFObject greatly simplifies the process of embedding Flash content into websites by providing a simple function that handles all the necessary parameters, content activation code and even comes with its own code generator.

Open Flash Chart is a great opensource chart plotting framework. It uses pre-compiled Flex objects to display data.

jQuery is a JavaScript library that is very well documented and works with most major browsers.

AMFPHP is the Flash Remoting Gateway for PHP. AMFPHP allows client applications built in Flash, Flex and AIR to communicate directly with PHP class objects on the server.