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.

Near Lock - A new way to lock your Mac. Just walk away.

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

MacID - Unlock your Mac with just your fingerprint, passcode, or wrist – without even unlocking your iOS...

Dimmer - A very small and free utility for Windows to reduce brightness on LCD/TFT screens.