[frankjr]

You can do something similar (albeit less fancy) without using any 3rd party applications on macOS.

1. Open Automator.app and create a Quick action.

2. Drag "Launch Application" to the workflow and choose an application to open. Save it.

3. Open Preferences -> Shortcuts -> Services and assign a keyboard shortcut to your action. Unfortunately, macOS will not let you assign many combinations. The other annoying thing is that running the shortcut is not instantaneous, there seems to be a noticeable delay before the action executes.