I'm sorry Ace777. I've looked for Open Source versions, and can't seem to find ANY that would help.
You could download trials of Macromedia Flash if they are available, but it'll mostly run out after like 15-30 days, and won't allow you to save, etc.
Swift 3D is another one I've heard about, but again its not free.
I'm surprised no ones tried to create an Open Source one.