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+# nauty
+
+[Nauty and Traces](https://pallini.di.uniroma1.it/) 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.