In this article we’ll build an XML-driven video gallery exploring a lot of new Flex 4 features (out in spring 2010): skinning spark components, spark containers, new states and transitions; but we’ll also use some “old” concepts like itemRenderers, custom events dispatch, load data from an xml file (using the Singleton design pattern), value objects, embedding fonts, css and a lot of other useful stuff when you develop Flex applications.

The company i’m working for, GnStudio, released Na.Bi.Ro, an open source Flex framework that provides a lot of classes to help Flex developers in their daily work.
WHY DID WE CREATE NABIRO?
There are two main reasons:
1) When you are working on enterprise projects with a medium/big team you have to define some guidelines and methodologies that all developers need to follow to create flexible and maintainable projects and to avoid to lose the right way.