Mrtrix3
MRtrix3 provides a set of tools to perform various types of diffusion MRI analyses, from various forms of tractography through to next-generation group-level analyses ([Tournier_2019]).
Official resources
References
[Tournier_2019]
Tournier, J-Donald, et al. “MRtrix3: A fast, flexible and open software framework for medical image processing and visualisation.” Neuroimage 202 (2019): 116137.