Flex developer? You better have it!
It’s all in one sample application using tools and component from core Flex components, Adobe AIR and data integration, as well as a variety of third-party components, effects, skins, and more. Over 200 runnable example added in the application. each with source code and documentation and other detail information. This [...]

This article present an open source architectural framework for Flex development called Cairngorm. An Architectural framework provide the internal structure of an application that separated into a few layer with the specific function. 
The Cairngorm microarchitecture addresses three key areas that Adobe Consulting has long recomended as best-practices for RIA development.
 

Handling user gestures on the client. [...]