Score voting (sometimes called range voting) lets voters rate every candidate on a fixed scale, rather than ranking them or picking one. Variants include STAR voting (Score Then Automatic Runoff), used in some local Oregon races, and approval voting, where voters simply mark every candidate they "approve" of.
Advocates argue cardinal methods better capture intensity of preference, eliminate spoiler effects without RCV's monotonicity edge cases, and are simple to tabulate at the precinct level. Critics note that score voting is vulnerable to "min-max" strategic voting (giving max score to your favorite and min to all others), and that voters tend to bullet-vote in practice anyway.
Score voting and approval voting have a small but growing footprint in the U.S. — primarily in nonpartisan municipal elections and party primaries.