Zenhub
We use Zenhub to bring some extra project management features to GitHub Issues.
Installing Zenhub
Zenhub is available as an addon for Firefox and an Extension for Google Chrome. It's available for download from their homepage
Boards
Boards are great for organizing, prioritizing and tracking issues in one or many milestones, across one or many repositories. The board organizes issues into pipelines (I.E. Triage, TODO, In Progress, In Review, Done) to help visualize the status of issues being displayed.
Burndown Chart
The burndown chart helps visualize your teams cadence over the course of a heartbeat. Each issue in a heartbeat can be assigned a numeric "estimate" value, which is a measure of the relative difficulty of the work. The burndown chart uses this information to graph the total amount of work over time.