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.
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Dimmer - A very small and free utility for Windows to reduce brightness on LCD/TFT screens.
Listary - Listary is a revolutionary search utility for Windows