...Stop what you’re doing right now and go to OSFlash. It’s the home for open-source software devoted to all aspects of Flash development. You’ll find tools for creating assets (vector art, animation, slide show wizards/convertors, etc.) and you’ll find tools for creating code (IDE’s, compilers, build systems, decompilers, etc.). You’ll find instructions for how to build an entire toolchain without touching a single proprietary tool or anything with Macromedia’s or Adobe’s name on it. So that quashes my whole “it’s proprietary no matter what Macromedia leads you to believe” complaint....