USB Raptor - Lock and unlock your computer using USB flash drives as keys.
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.
VSUsbLogon - Free software for Windows, Encryption Software for Windows, Video Downloaders, Login to Windows via USB device, Logon Screen Customization
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
Near Lock - A new way to lock your Mac. Just walk away.
Redshift Color Temperature Adjuster - Redshift adjusts the color temperature according to the position of the sun.