rcmd - rcmd makes app switching instantaneous!When you have a lot of apps open, finding and switching to them might feel too slow using Command-Tab or the Dock.Hold down the right side |⌘ command| and press the first letter of the app name to focus it.
Magnet Window Manager - Magnet Developers
Charmstone - The quicker switcher launcher for macOS
Switch for macOS - Keyboard-driven commands to navigate your mac apps faster.
Contexts - Switch between application windows effortlessly — with Fast Search, a better Command-Tab, a Sidebar or even a quick gesture. Free trial available.
SwitchGlass - Customizable app switcher for Mac