Dont know if people saw this one: https://freeriatools.adobe.com/learnflex/ Flex Builder already had a 60 day trial, but anyway it says its free (for non commercial use) if you arent currently a paid dev. I've already got the standard version (not Pro ) -- at least its not the price of Flash CS4...
I think the idea is to let people use it to produce something - if they see it's useful, then they'll scrape the cash together to get the commercial version?