Time Out - Break timer with micro-breaks for Mac OS X.
BurnoutIndex - Check your burnout risk. Backed by science, forever-free.
Breaktime - Break time is an app that reminds you to stand up every chosen amount of time.
How Entrepreneurs Can Prevent Burnout - The handbook for busy founders on how to escape burnout
stretchly - break time reminder app
Best10 - 100% personalised workouts, eating plan & a certified coach.