Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!
Focusmate - Distraction-free productivity via virtual coworking
Stopwatch - A Java countdown timer and stopwatch. Features a fullscreen and a resizable window mode.
Pomodoro Timer UWP - Be more productive with your time
TimeLeft - TimeLeft is a versatile desktop utility - it can be used as a countdown clock, reminder, clock...