Timetaco - Create your own countdowns, as easy as 3, 2, 1
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Coountdown - 3 2 1 ! Create day counter on menu bar macOS. 🚀
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Padbury Clock Screensaver - Minimal screensaver for Mac
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.