As part of the BlueGreen RIA Platform, we are also working on an AS3 framework. BlueGreen AS3 Framework will not be as extensive as the current popular AS3 frameworks, but will contain many practical concepts that simplify your projects:

• A MainApplication class that initiates a bunch of useful things like flasvars
• An Application base class letting you create your skinnable application
• Utilities for shapes, printing, cloning,etc...
• Box layout
• BlueGreen RIA IDE integration

We are planning on releasing an open source public beta version in 2010 June. You can follow LyciaSoft on twitter for the latest news.