Adobe Flex Builder is an IDE for developing applications that offers both robustness and richness of presentation. Naturally, it is also compatible with Flash. This article gives you a first look at the IDE.
Flexing the Flash Review - My first Project with Flex Builder2 (Page 2 of 6 )
You typically start with the executable, FlexBuilder.exe. This opens the IDE. This IDE, like most others, is replete with everything that is needed for a cutting edge web project. This tutorial is not intended as complete reference material, but as a teaser which may encourage you to look into it. When the program starts a large number of windows will be open, and if some of them are not, you can access the windows by going to the Window menu item and picking the drop-down Show View as shown in this picture. In order to show the barest detail to start with, I intentionally closed all the windows from the IDE's default start-up state.
When you click on the Navigator drop-down menu item, you open up the window for the navigator. It's very much like Project Explorer in Microsoft. Out of the box installation comes with the FlexStore project. Test Flex is one of my projects.
Flash 
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Introducing the Flash Communication Server
