Does anyone have examples of really well-governed, reasonably large FOSS projects? (Ideally languages, but others would be good too.) Or a governance process/mechanism/system that you particularly like?

A few years ago, I would have said #rustlang or #Python. But #rust's RFC process seems to have hit some growing pains and Python's BDFL isn't.

So now I'm not sure who I'd say Gets It Right™. Any suggestions?