Some of my Mac fanatic friends (you know who you are) are accusing me of neglecting them. I have taken their complaints into consideration.
Just got to know about Bryce 5.5 (134.85MB), an amazing 3D landscape and animation software from DAZ productions. I haven't tried it out but from the reviews I learnt that it is easy to use and end results are fantastic (for a free software).
It's totally free but you have to register with them in order to get a free serial number and unlock the software.
It is presently #1 on Download.com for free Mac software.