As someone that is VERY interested in applying Julia to translational (or near translational) research in medicine I very much agree there is some void here. However, I’m not sure exactly what sort of packages would go in such a organization. All those topics you mentioned are really implemented in one form or another elsewhere. If you just want these things conveniently accessible from a single package with a nice binding syntax then that seems more like a single package than an organization.
BTW. I think it’s worth considering, but I’ve thought about the same thing and would like to see where this goes.