Amazing free 3D modelling software

This is the coolest piece of modelling software I’ve ever seen. If you’ve ever struggled to even resize a cube in Blender then you’ll love this:
http://www.sculptris.com/index.html

Here’s a demo on youtube:
http://www.youtube.com/watch?v=6DNRg6pdNeE

Better still, it runs beautifully under Wine on Linux.