Originally started by Neo Technology's Alistair Jones (www.apcjones.com) as a side project for graph documentation and visualization, the Arrows toolset today enables very easy and usable documentation of graph database models. The tool is available online at www.apcjones.com/arrows and provides very basic but advanced graph drawing capabilities.
The nicest thing about the Arrows model is that it enables the mapping of the property graph model of Neo4j to the drawing canvas. Its automatic scaling and alignment features are also extremely useful.
The Arrows toolset, which is an open source project publicly available on https://github.com/apcj/arrows.