What is ActionScript?

Read the WIKIPEDIA entry for ActionScript

Action Scipt Editor

SEPY is an open source text editor built especially for Flash. Check it out at http://www.sephiroth.it/python/sepy.php

OSFlash.org

OSFlash.org is a watering hole for open source Flash developers and users to meet, talk about and contribute to new and existing open source projects for the Flash Platform.