You might want to try Multiwfn (  I believe it has the ability to generate Natural Atomic Orbitals.

Hope this helps


El sáb., 30 may. 2020 a las 10:55, G. Gopakumar gopakumar.gopinadhan(_) (<>) escribió:
Dear Partha,

     You can probably try JANPA

Though I am not sure whether this is a substitute for what you are actually looking for.


On Sat, 30 May 2020 at 16:32, Partha Sengupta anapspsmo* <owner-chemistry{}> wrote:
Sir, Is their any free substitute software of " NBO 7.0" ?
Dr. Partha Sarathi Sengupta
Associate Professor
Vivekananda Mahavidyalaya, Burdwan