Mountie - Mount a second screen (iPad/iPhone/tablet) to your MacBook

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.

Duet Display - With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.

CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder

Luna Display - Hardware that turns the iPad into a wireless second display

Redshift Color Temperature Adjuster - Redshift adjusts the color temperature according to the position of the sun.