Another very cool visualization tool for observing messages as they're passed between processes: <a href="https://github.com/koudelka/visualixir" rel="nofollow">https://github.com/koudelka/visualixir</a>
I used Ubigraph for erlang to visualize process linking in BEAM. <a href="http://eddwardo.github.io/elixir/links/2015/11/04/links-in-elixir/" rel="nofollow">http://eddwardo.github.io/elixir/links/2015/11/04/links-in-e...</a>