Zbrush 4R7 added a Zmodeler brush which sort of work like other application's polygon modeling tool. Paul Gaboury is the master of this tool. He has a workshop Zbrush4R7 Everything you need to know with a side of mech. Here's 1 of his student's work.…
Xnormal is a baker. It bakes maps such as normals, ambient occlusion, etc, from high detailed model to a low polygon model. 3D Coat is a whole nother program. Very popular in this forum for doing hand-paint textures. 3D Coat itself can be used for modeling and sculpting too, and also offer really powerful auto retopology…