I'm coming back to looking at a lot more at JanusGraph. I did contribute a tiny script typo fix under the Hortonworks banner ages ago, but am now offering a more sizeable contribution, and hopefully and ongoing one.
The first thing is some additions to the excellent Ambari Service from chupman, which I have wrapped up and slightly tweaked into an Ambari Mpack at https://github.com/simonellistonball/janusgraph-mpack which makes it a little easier to deploy onto a blueprint, or cloudbreak Ambari cluster.
Would there be any interest in taking the mpack work into the Janus project as an extension of the current Ambari service?
Would anyone be interested in collaborating on this, and maybe adding some client and visualisation capabilities?