Package nauty

https://pallini.di.uniroma1.it/

Nauty and Traces are programs for computing automorphism groups of
graphs and digraphs. (At present, Traces does not accept digraphs.)
They can also produce a canonical label. They are written in a portable
subset of C, and run on a considerable number of different systems.

There is a small suite of programs called gtools included in the
package. For example, geng can generate non-isomorphic graphs very
quickly. There are also generators for bipartite graphs, digraphs, and
multigraphs, and programs for manipulating files of graphs in a compact
format.

Version: 2.9.1