Eric Winemiller kindly sent his DAZ Carrara Digital Carvers Guild plugins open source last summer. Ground Control for DAZ Studio has also now been released for free. Always free, really free, which is what ‘open source’ means. Ground Control imports DEMs (digital elevation maps) into DAZ Studio, along with Terragen .TER files.
Readers of this blog who are here for my 3D comics production posts, will likely be most interested in the Toon! Pro plugin for Carrara, now free in the bundle. Although in terms of what it can do with artistic inked lines it seems to have been superseded by Poser 11.