Allen Brain Atlas
The Allen Brain Atlas as a Resource for Teaching Undergraduate Neuroscience Terri L. Gilbert J Undergrad Neurosci Educ. 2018 Summer; 16(3): A261–A267. Published online 2018 Sep 15.
Voxel-Man 3D-Navigator: Brain and Skull Regional, Functional and Radiological Anatomy
"Availability CC BY-NC-NDVoxel-Man 3D-Navigator: Brain and Skull was originally published in 1998 by Springer-Verlag (as Voxel-Man Junior: Brain and Skull), with updated versions published in 2001 and 2009, respectively. Since 2018 it is available under a Creative Commons license."
"Download VOXEL-MAN 3D-Navigator "The interactive anatomy atlases VOXEL-MAN 3D-Navigator: Brain and Skull, Inner Organs and Upper Limb for Windows PCs have been published under a Creative Commons “Attribution – Non Commercial – No Derivatives 4.0 International” License (CC BY-NC-ND 4.0). They can be downloaded free of charge from this page."
https://www.voxel-man.com/3d-navigator/downloads/
The Visible Human Project
The Visible Human Project: Tools for Use with the Visible Human Data Set
Wikipedia article about Visible Human Project