The SCM web site contains several pointers to third party software that can be used in combination with ADF, namely contributed software, and NBO. These include interfaces to output visualization programs and to programs that can be used for additional analyses, such as Bader's Atoms-in-Molecules (AIM) approach and Weinhold's Natural Bond Orbital (NBO) method. Prof. Weinhold's GENNBO 5.0 executable is available in the ADF distribution.
Contributed software
ADF User Documentation: NBO
ADF-GUI: analysis
Related: analysis options in ADF
