Alfred app for Mac. It is kind of a spotlight replacement for Mac but so much more. Think of it as turning your machine into productivity powerhouse where you are using the keyboard to access everything very quickly instead of wasting your time clicking around with the mouse. It is like a Swiss army knife where even just one of its features is a whole app for other people.
I use it all day everyday for the past decade. And I keep adding to it new workflows or discovering new features. It is the app that is a million apps in one.