TimeOut gently reminds you to take a break on a regular basis. For instance 10 minutes every hour, and 15 seconds every 15 minutes.
TimeProgress shows you what percentage of the current year, quarter, month, week or day has passed (or is remaining).
A macOS menu bar clock with a fully customizable date/time display and a calendar. Inspired by Day-O.
Timey is a simple timer and stopwatch that shows up in the menu bar. Time presets are the core part of the app.