Uninstall an application cleanly

Also remove the files it leaves behind.

1. Quit the application, then drag it from Applications to the Trash.
2. Look for leftovers in your Library:

   open ~/Library/Application\ Support
   open ~/Library/Preferences
   open ~/Library/Caches

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3. Delete the folders bearing the application's or publisher's name. Do not touch anything else.
4. For an app installed with Homebrew:

   brew uninstall --zap --cask nom-de-lapp

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5. Easy alternative: AppCleaner (see "Recommended software").