Mac Flash

I’m looking to start programming flash, I’ve got a tutorial and everything, but Adobe is shutting down all trial downloads 'til July 1st and I don’t want to wait that long and I also don’t want to shell out a couple hundred bucks for the software, 'cause unless I really get into it this, this is only going to be a minor hobby. So if someone can show me or point me in the right direction for a trial or free program for the Mac so I can start programming flash I’d appreciate it. I have a PowerPC G4, with Mac OS X(10.4.11.)