There are extensive voxel sculpting capabilities which (as I understand it) are somewhat similar to ZBrush.  Certainly, they have similarities with Sculptris.

A poster on another forum offers this comparison:

Quote - I think Zbrush is more better for high frequency details, its more consistent and faster but more rigid in its work flow, its mostly unfathomable in its workflow.

3DCoat is way more freeform and flowing and intuitive in its workflow(its ui at least) but its harder to get the really fastidious details. I like the modelling in it though, its like working with real clay, its a bit harder to get it where you want it, but its more satisfying in doing so.

http://www.polycount.com/forum/showthread.php?t=69404

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.