[osflash] Free AS3 compilers?

[Merrill, Jason]

Is the Flex 2 SDK the only free compiler for AS3?  I don't mean Haxe
either - :)   I mean strictly for writing AS3 code.  

I wrote some code with the Flash CS3 preview, just messing around and
need to know what my options are for doing AS3 development before my
company finally gets around to approving Flash CS3 for purchase.
Thanks!

Jason Merrill
Bank of America  
GT&O Learning & Leadership Development
eTools & Multimedia Team