Every weekly league keeps score somehow, so the only useful question is which tool fits a nine hole night at a public course.
Most league organizers start comparing software after one bad Thursday. A card came back with a hole left blank, the flight standings taped to the pro shop wall went two weeks stale, and half the roster quietly stopped believing the points column. The real decision is not which product has the longest feature list. It is who touches the scores on league night, how many minutes that takes at the counter, and how fast the standings settle afterward.
BackNineLive does one job. It takes nine hole league cards, applies a handicap, sorts the flights and publishes standings while golfers are still loading clubs into the trunk. The alternatives below are all real and all used by real leagues in the United States. They assume different operators, different setup budgets and different amounts of committee time before week one, which is why the honest answer changes depending on how many events your course runs a year.