fNabla

fNabla is a fast and easy-to-use tool for converting between displacement, normal and curvature maps with generation of ambient occlusion maps for any of these inputs. (Note ambient occlusion requires an NVIDIA gpu)

In addition to the user-friendly interface there's a command line utility that allows complete automation of its functionality for fast operation over multiple inputs. This utility can be found in the chosen install location (by default: "C:\Program Files\BorjaFranco\fNabla\fNablaBatch.exe") and includes some example commands available by executing it with argument "-h".