Our team is starting to use 3D-Coat V3 as part of the 3D online content creation workflow in conjunction with Blender, Photoshop and Unity3D. I think this is particularly interesting (maybe) as 3D-Coat has a primitive building mode which is something sort of famillar to us from OpenSim and Second Life content creation. This tool though appears to be a lot more powerful than the OpenSim viewer based building tools as it will render the prims out into standard meshes.
3D-Coat has tons of features including voxel sculpting, auto-retopology (useful to get models down in complexity = shorter downloading) and layered painting. It looks like it will complement Blender very nicely and allow us to work faster on certain tasks.
Check out the gallery examples of things made with 3D-Coat here. I am sure our team will be posting some more comments on this tool as they start to use it now.

Image by Anto Juricic Tony, from the 3D-Coat Gallery
The lead software developer of 3D-Coat is a Ukranian guy Andrew Shpagin and he asks:
As 3D-Coat creators we ask you not to use the program for making pictures which would increase vices, especially pictures that would provoke dissolute thoughts. We all have responsibility before God and before mankind for everything we're doing. Do we make this world better?
I don't go for the zealous stuff, but I guess we share a common passion for making things that elevate our minds and inspire people around the world to explore positive things rather than dragging them through the base levels with random sex and violence. I am sure our Quest History work will be a great example of the best of what 3D interactive online can be.