A set of Action Script 3 utility classes. Licensed under MIT license (http://opensource.org/licenses/MIT).

This utilities was initially written by Ivan Filimonov, Oleksander Kuzmenko and Pavel Colomiets, and later contributed by Elena Kuznetsova and Ivan Shaban. This package includes advanced EnterFrame handler, built on callbacks. Also there is a pooling implementation, some utility classes such as Set, Median and Rect and utilities function for working with Strings, Arrays (Vectors) and Objects (Dictionaries), mostly inspired by python.

as3commons.collections - http://sibirjak.com/osflash/projects/as3commons-collections/