LaunchBar Commander is what is commonly referred to as an "Application Launcher"; it is typically docked to the side of your screen and lets you configure buttons and menus which will launch your favorites programs. It is a freeware launching application that's customizable, easy-to-use, helpful and well-designed.
Here are some screenshots to illustrate the features and user interface of this application:
7+ Taskbar Tweaker
Easy Dark Mode
Open Shell
DesktopOK
Earthview