Related: For hackers, a well know example of community using a method other than the simple majority rule is Debian. They use the Condorcet method [1] for the election of their project leader [2]. It's a ranking method «that elects the candidate that would win by majority rule, in all pairings, against the other candidates».

[1] https://en.wikipedia.org/wiki/Condorcet_method [2] https://www.debian.org/vote/