ZBrushCoreMini is a new entry-level free version of Zbrush, sitting below its budget ZBrushCore in the Zbrush range. It’s relatively confusion-free, with just eight sculpting brushes and a few basic materials. There’s also .OBJ export, with no watermarks. Downloading ZBrushCoreMini requires a sign-up, and it appears to be perpetual free desktop software.
It would be interesting to see if this could be hooked into GoZ or an equivalent, for round-trip calling from DAZ Studio, Poser etc like the big ZBrush.