AppleEvent Decoder Ring 1.0 (Mac)
Source: Chilton Webb
To use AppleEvent DecoderRing, simply click the 'Import Dictionary' button and select the dictionary of the application you would like to translate. Now create an AppleScript using the Script Editor and run it. As you do, you will see the AppleEvent data being processed by the AppleEvent DecoderRing! You can also use it to decompile the AppleScript into AppleEvents using the simple steps explained in the program.