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Check out the Assimilation Project [1]. It facilitates automatic infrastructure discovery and uses the Neo4j graph database for visualization / querying. More info about the project here [2].

[1]: http://assimilationsystems.com/

[2]: http://linux-ha.org/source-doc/assimilation/html/index.html

Our users (graphistry.com) do this with our visualizer. You don't really need a heavy-duty graph database for that part, stuff like SQL or even lighter weight things are more normal.

It gets fun for us when we help visualize a full enterprise (hundreds of thousands of users, devices, apps..), and even more so when event data enters the picture. We do the former with our GPU tech, and push the latter to generic big data systems like Spark or Splunk that should already be in place before this becomes worthwhile.

My company offers a tool to search, edit and visualize graph data: http://linkurio.us/

You should try it out :)

I actually have you guys open on a tab somewhere. I'll check it out at some point.