Почитать: Essential Actionscript 3.0 by Colin Moock ISBN-10: 0-596-52694-6, Actionscript 3.0 Cookbook by Joey Lott, Darron Schall, Keith Peters ISBN: 0-596-52695-4
Неплохой бесплатный редактор:
www.flashdevelop.org/downloads/releases/FlashDevelop-3.2.2-RTM.exe 
