A quick search shows several competitors in the space, but it's not immediately clear what the key differentiators are. The all have GitHub issue integration, i.e. there's a 1:1 mapping between moving a card to done and closing an issue. Are there other features people have found valuable that exist in one vs. another?
Sorry, was trying to avoid biasing the results. Looked at waffle.io, zenhub, huboard, blossom.io... Some others. Google kanban github and a bunch come up.
* HuBoard (https://huboard.com/)
* Waffle.io (https://waffle.io/)
* SweepBoard (http://sweepboard.com/)
* ZenHub.io (https://www.zenhub.io/)
but I'm not using any of them. There was one more, but can't recall it. I will add it here when I remember what it was.
Edit: Found it, although it's a Chrome Extension.
Edit 2: I missed:
* TaskTub (http://tasktub.com/)
and just found:
* Blossom.io (https://www.blossom.io/)
* Gitban (http://www.gitban.com/) - looks good, but like a work-in-progress demo/MVP