Quicksilver is a fast and free macOS productivity application that gives you the power to control your Mac quickly and elegantly. Quicksilver learns your habits, making your everyday chores simple and efficient.
The first productivity tool I ever encountered, I still love this launcher because of it's single-modifier-tap shortcuts. For example, to open Chrome, I type "⌘, C". It's simple and fast.
this is the first app I add to any new mac Have permission to do so on. I really only use it as an app launcher, but I know ir can do far more; I've just yet to dedicate the time requredto learn it.