Well it seems that they are crap since I have found over a hundred that belonged to apps that I have deleted over the past year. Anything that is left after I delete an app is refered to as "crap".
Currently Being ModeratedJun 13, 2012 11:52 AM (in response to worksafe)
In the future, you can use "AppCleaner" to uninstall applications and all their attendant bits and pieces.
"CleanMyMac" is a paid app, but has an automated routine for cleaning up after uninstalls and many other "cleaning" routines for the mac.