Arrows is intended to talk to Neo4j, a property graph database. Ward has read blog posts comparing Property Graph and Triple Store, and finds them pretty much identical. Like in Animal Farm, they are all equal, but some more equal than others. Which representation is preferred depends on the author. matrix 
Alistair Jones is introducing and demoing the graph drawing tool Arrows.
YOUTUBE ZHJ-BrKJ8A4 Introduction and Demo Graph Drawing with Arrows.app
Try now site . You can use it to draw, annotate, style, rearrange, share your graphs and also import them into Neo4j.
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Back in Gather.town, meeting with fedwiki-geeks and learning about visualization. On Marc Pierson's page you'll find the arrows.app which can be used to generate graphs which can be used in fedwiki.
Here is Pierson's My Frequent Tools Page.