When an open source project has gotten stuck, how do you get it unstuck? Especially if you aren't already its maintainer? My teams have done this with several projects. A new contributor, who's never worked on a project before, can be the catalyst that revives a project or gets a long-delayed release out the door. I'll share a few case studies, principles, & gotchas. More than developer time, coordination & leadership are a bottleneck in software sustainability. You'll come away from this talk with steps you can take, in the short and long runs, to address this for projects you care about.