Flash and math

http://www.flashandmath.com/

Garbage collection

Understanding garbage collection in Flash Player 9
Resource management strategies in Flash Player 9
AS3: Weakly Referenced Listeners
AS3: Resource Management pt 1

Accordion Skining

Two articles about Accordion Skining in Flex
Andrew Trice
Kevin Hoyt: Programmatic Skinning with Flex 2

CSS in Flex

FontManager

Несколько ссылок про стили.
Adobe - Flex Quick Start Basics: Skinning your components

Runtime CSS
Ted On Flex: Flex 2.0.1 - Understand Runtime CSS
Loading style sheets at run time -- Flex 2.01
The Kiwi Project: Loading Flex Skins at Runtime

Embedding HTML in a Flex application using an IFrame (Deitte.com)

Finally Updated: Embedding HTML in a Flex application using an IFrame (Deitte.com) Способ добавить HTML во Flex приложение. Использует ExternalInterface и IFrame

Еще одна статья про использование ExternalInterface
Vic on Flex: A closer Look at IFrames and ExternalInterface in Flex

Fisix Engine | Flash Action Script 3 Physics Engine for Game Developers

Fisix Engine: The Fisix Engine is an Actionscript 3.0 physics engine built for game developers.

Funny example

More about inverse kinematics

Tutorials - Apollo (Community) « EverythingFlex.com

Tutorials - Apollo (Community) « EverythingFlex.com: "Tutorials - Apollo"