Thor is described as 'Switch the right application ASAP' and is an app. There are 2 alternatives to Thor for Mac. The best Thor alternative is Command-Tab Plus 2.
Command-Tab Plus is a keyboard-centric application and window switcher for Mac, offering a powerful alternative to the built-in macOS switcher. It boosts productivity with features like quick app switching, isolated workspaces (Spaces), hiding inactive apps, and customizable ...
When you press Command-Tab on your Mac, Apple provides you with a simple App Switcher: So now, with SuperTab installed, pressing Command-Tab gives you a whole lot more:
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