Degrafa is a declarative graphics framework fo Flex which aims:
Bringing the graphics classes up a level to provide a common ground between developer and designer within Flex
Enabling the graphics classes to become first class citizens within the Flex framework.
Minimizing the learning curve of Flex graphics development.
Degrafa allows you to use MXML markup to draw shapes, make complex graphics, create skins and also includes advanced CSS support.
Rather than ActionScript, MXML is easier to read an learn, specially for a designer’s point of view.
There are great samples of what can be done with Degrafa here