Touch Bar Timer is a little stopwatch for your Mac’s touch bar. Tap to start/stop Double-tap to reset Hold to open the app preferences More background: https://www.alexzirbel.com/touch-bar-timer It's also open source! Thanks to Pixel Point, whose "Mute Me" app was the starting point for this project.
Since its conception in 2014, Chronograph.io has been allowing users around the world to share live timers and stopwatches. Start a marathon from one phone; end it from another miles away. Have each team member reset the scrum clock. All is possible.
Multiuserstopwatch.com is a free web aplication to measure time by many users joined in the same session. It works like a multiplayer application where different users log in to the same session and they can operate (start,stop, measure split times) the session stopwatch from diferent devices/paces.