are contained in one folder and are easy to get rid of.
However, without the aid of an uninstall feature, that leaves a bunch of Preference files behind. These are easy to find, Library > Preferences, and take up virtually no space.

A couple of apps come to mind:
AppZapper and Uninstaller.

Spring Cleaning is another one but I still do not trust it. I remember making numerous housecalls, and collecting a considerable amount of money, repairing the damage done by an earlier version of this program.

Hope that helps