The graph module uses GraphViz to draw graphs. Here are some examples I've put together, but much fancier thinges are possible. See http://www.research.att.com/sw/tools/graphviz/refs.html for GraphViz documentation, and see http://www.research.att.com/sw/tools/graphviz/examples/ for some examples.
By popular demand, the #ruby translation from #perl6 original, https://gist.github.com/awwaiid/115d8d270c43011b5d24e9566147b13d …
My entry for the company's NCAA bracket https://gist.github.com/awwaiid/32ef1d2110ccceee3d0cb839546ae055 … #perl6 #NCAATournament #bracketology
Ruby Magic 8 Ball exercise from #retroruby yesterday https://gist.github.com/awwaiid/ccae9a28227dfa1ff871c42218fe8ff1 …