Pixologic have released a version of ZBrush, intended for new artists, ZBrush Core Mini is free and for non-commercial use only.
“ZBrushCoreMini is all about sculpting. Start with a simple sphere or a stone block, then use a select group of the most popular digital sculpting brushes from ZBrush to add or remove material and simply… create! ZBrushCoreMini frees you to explore your imagination.
Once you are happy with your creation, it also provides an exciting new way to share your work with others, through the iMage3D format. On any website, this will simply appear as a regular 2D image. But other users of ZBrushCoreMini can open the file in full 3D!
And with 3D printers increasingly coming into their own, ZBrushCoreMini includes the ability to export your model for real-world printing.”
Download ZBrushCore Mini for free, here.