A new voxel modeling tool named Acropora, from Voxelogic, is in development.  Its claim to fame:  Procedural Voxel Modeling with noise perturbed meshes.  With 30+ volume modifiers, automatic generation of 3d noise (volumetric, perlin, and fractal), LOD support, and more, it looks like a great tool for anyone involved in creating terrains or geophysical models.

An alpha build is expected to be downloadable shortly.

via Welcome to the Voxelogic.