At open@adobe [1] is nice description of flex which could be used after
some tweaking:
Apache Flex is a highly productive, open source application framework
for building and maintaining expressive web applications that deploy
consistently on all major browsers, desktops and devices (including
smartphones, tablets and tv). It provides a modern, standards-based
language and programming model that supports common design patterns
suitable for developers from many backgrounds. Flex applications run in
the ubiquitous Adobe® Flash® Player and Adobe® AIR™.
[1] http://sourceforge.net/adobe/flexsdk/wiki/About/
