It’s free and open source.
obfuscation actionscript source like this
video how-to http://youtu.be/SWr-iM6z2mI
Jpg how to http://swf-flash.blogspot.com/2013/04/obfuscator-action-script.html
source https://sites.google.com/site/murmadillo/content/obfuscator_as3_18_04_2013.zip