For those of you building software communities using GitHub, have you tried ZenHub?
It is essentially a project management tool that integrates pretty seamlessly into GitHub. It is similar in some ways to Waffle.io, but I find it integrates much more neatly and it fills some gaps that are really missing in GitHub.
It looks a little like this (note how integrated it is into GitHub's core UI):
Here it provides your usual Kanban style view, which are mapped to issues.
You can also view milestones as burndown charts which I always find an incredibly useful tool:
Anyone tried it or use similar tools?