Flest is an application framework for building enterprise RIAs in Adobe Flex 3 and ActionScript 3. It uses such design pattern as Controller, Factory, Command, etc. High efficiency, simplicity and practicality were set as its mandatory design features.
z3bbLib is an actionscript 2 library with alot of usefull classes. These are for design patterns, visual effects, managers, extended math,etc. With documentationand examples about classes and methods.