Are you also annoyed that on Mac OS while its super easy to install / uninstall applications, they often leave some trash behind (~/Library/ApplicationSupport …). With AppTrap you can automatically get rid of those files too once you delete an app.
It monitors your trashcan. As soon as you move an app to the trash it tries to find associated files and asks you if you want to get rid off them too.
And best of all, its free!