zlacker

Insights -> contributors, and number of active maintainers based on entire commit history of the project and frequency of commits. Also, network page which shows number of active forks. Also, PRs, and how are they handled.

Contributors is the most informative page for me. So many projects are 1 man show basically all the time. I don't mind that, it means passion, but it also mean it can dissaper any moment depending on circumstances.

I also look into issue details to see how maintainers communicate with community members that do due dilligence before aksing for help.