Free tool
Round robin, sorted in seconds
Open-play organizers: stop shuffling names on a whiteboard. Type who's here and get a rotation where everyone partners everyone as evenly as the math allows.
Who's playing? (0 players)
4–16 players. Partners rotate as evenly as the math allows, and when your count isn't a multiple of 4, sit-outs rotate evenly too — nobody warms the bench twice while someone else never sits.