AppZapper - The uninstaller Apple forgot.
appzapper.com
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
AppZapper is for people who want to confidently try new apps while knowing they can uninstall them easily. Drag one or more unwanted apps onto AppZapper and watch as it finds all the extra files and lets you delete them with a single click.