I’ve just finished putting together my ActionScript decompiler. It’s able to decompile AS2 and AS3 code. It’s still a little rough around the edge. I’ve yet have time to optimize the output so you’ll see a lot of odd expressions like !(arg1 == 5) instead of arg1 != 5. Could still be useful though if you’re curious about how a Flash site is done.
P.S. Anyone know a free hosting service with relatively high memory limit? PHP is not very good at handling a lot of small objects. My script has a way of bumping up against the 64M limit at 000webhost when an SWF file is code-heavy.