Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
Headspace - Meditation made simple. Brilliant things happen in calm minds.
Effortless - Stay focused and beat procrastination on your Mac.
BioBase - Measure and manage your stress
Pulse.red - A powerful time tracker for those who appreciate simplicity
Forest App - Forest is an app that helps you stay focused on the important things in life.