|Get it free while you can!|
They're giving the 3D terrain modeling and animation commercial software Bryce 7 Pro absolutely free, along with their 3D modeler Hexagon 2.5 and the normally-free Daz Studio 4 which now included commercial Genesis included for free--all free for a limited time.
I just one day last week went to this site by chance just to check out Bryce 7, and surprise! It's free! I just wish I had found it sooner!
So, if you're interested in checking them out, even just to fool around with them, go there and download them! This goes well with Blender and Unity Indie version--both of which I use for my game development.
Though I already own other software for my game terrain, it certainly never hurts to have more! Bryce 7 Pro in particular has some very useful terrain generation and rendering features. And for free!