Appresize

Appresize is a utility to resize and move apps from anywhere on the window with custom modifiers and other preferences.

move and resize window from anywhere — Although not captured by the screen recorder, the cursor does follow window

window preferences — Custom modifiers & other behaviors

One of my favorite abandonware apps on macOS was an old closed-source Objective C application called Hyperdock that had a small secondary feature to resize and move windows by a modifier from anywhere on the window.

There are various window utilities on Mac, but none of them satisfied my very specific expectation. Now, this demand lives on with Swift in a small utility here.