If you've done 3D CGI work, especially humanoid figures, you might be aware of the excellent modelling package Daz Studio. Or you might know about the 3D landscape generator Bryce, also produced by Daz (after being purchased by them a few versions ago).
For a limited time, DAZ are making all of their core modelling programs freely available.
Head over, see some of the amazing stuff you can do with their software.
[EDIT: Oh...the link is ]