Is the digraph module the only way to deal with graphs in Erlang?

[G.S.]

Hello,

Are there any other modules which are similar to the Digraph module? I'm
working with large graphs, and though I have my own encoding system for
them, I was hoping to switch to something standard, which is why I
originally wanted to start using Erlang's digraph module... but it's
somewhat clumsy, especially with the way it uses ETS.

If anyone knows of another graph type module in Erlang, or have other
suggestions, that would be great.
Regards,
-Gene