Pyxel Edit is a pixel art and tileset creation tool. It’s made in Adobe Air, runs on Windows and Mac, and is currently in open beta.
Tutorial: Command Line Parameters in an AIR Application
Source code to all AS2 and AS3 games from Terry Paton
Using ActionScript Workers - Part #1 Part #2
Learn how to use the new concurrency features in Flash Player 11.4 by building an MP3 encoder.