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

Common libraries:

http://casalib.org/
http://code.google.com/p/as3corelib/

Physics Engines:

http://box2dflash.sourceforge.net/
http://www.cove.org/ape/

Flash 3D engines:

http://away3d.com/
http://papervision3d.org/
http://alternativaplatform.com/en/
http://www.flashsandy.org/

Tweening:

http://greensock.com/gsap-as/
http://www.gskinner.com/libraries/gtween/

Graph/Chart + Particles:

http://flare.prefuse.org/demo/

Chart:

http://pullmonkey.com/projects/open_flash_chart

Particles:

http://flintparticles.org/

Game Engine:

https://code.google.com/p/pushbuttonengine/

Augmented Reality:

http://www.libspark.org/wiki/saqoosha/FLARToolKit/en