Time Out - Break timer with micro-breaks for Mac OS X.
f.lux - f. lux is a piece of software for Windows, Mac, Linux, iOS, and Android that provides a blue light filter over your screen. Research suggests limiting our exposure to blue light in the hours before bedtime can help us fall asleep faster.
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
StretchMinder - Work break timer with guided movement & breathing exercises
Redshift Color Temperature Adjuster - Redshift adjusts the color temperature according to the position of the sun.