Things that you obtain and forget about or hardly ever use. Most often lost in a remote virtual space impossible to find or delete. Dust Apps are applications that are destroyed in the process of backing up your hard drive during a spring cleaning. You don't need them and won't miss them.
<s> h8 spring cleaning...can't ever decide which music to keep and which porn to del
<g> I keep it all lol
<g> just making sure i keep everything i need before getting rid of all the dust apps i've accumulated