Generally, an application can be uninstalled simply by dragging it to the trash. Most apps though, leave preference or support files behind which can build up over time. AppTrap installs as a preference pane and when activated runs in the background until you drag an application to the trash. At this point, it displays a dialog asking if you want to delete all associated files. Quite slick and very transparent for users.

The developer has billed AppTrap as the feature that Apple forgot, but it is also the feature that you can install and forget about. It’s approach is more Mac-like than the similar applications like AppZapper and AppDelete, which involve running one application just to delete another.

There is; however, one known issue that the developer notes on the download page – it can’t uninstall itself… yet.

AppTrap is open source and free although donations are accepted. Which uninstaller tool do you prefer for OS X?