looks like fancy but chrome only version of https://github.com/jcouyang/gira
Do you use gira, at first glance it like it only works on public repos? It looks like an acceptable but rather thrown together alternative to both Huboard and Zenhub.
(Background: we used Huboard, but essentially have too many issues for it to handle & I'm curious what other workflows people use and if Zenhub could handle what Huboard can't.)