Most useful ActionScript packages / libraries

Question

What are some useful plug-ins, packages or source-code for ActionScript?

Please include ActionScript version, name, link and description.

Answer 1

Flixel

Flixel is an open source game-making library that is completely free for personal or commercial use. Written entirely in Actionscript 3, and designed to be used with free development tools, Flixel is easy to learn, extend and customize.

Answer 2

Mate tag-based, event-driven Flex framework. Obviously AS3 and Flex dependent.

Axiis an open source data visualization framework. Built on degrafa

Answer 3

AS2-AS3
Greensock's TweenMax
Simplifies creating animation in code.

Answer 4

http://www.robotlegs.org/

MVC Framework for flash/flex with dependency injection.

Answer 5

it's powerful 2d library. you should try it ;) http://box2d.org/

Answer 6

A clear, lightweight and performant data structures / collections library:

AS3Commons Collections

Layout framework:

AS3Commons UI - Layouts