Please add STAR Voting #1
Description
The best single-winner system by far is STAR Voting
Info at https://www.starvoting.us/
It's simpler than ranked-choice tabulation, trivial to program, and it resolves the problems with ranked-choice tabulation (STAR was originally developed for that very purpose, to provide a superior voting method).
You can go ahead and see it in action at https://star.vote/ (which has code at https://github.com/msmunter/star.vote/ )
There's also a more complex STAR-PR proportional voting approach as well as some simpler multi-winner versions of STAR.