The idea behind the PaperKarma app should be appealing to anyone with a physical mailbox - they aim to stop unwanted paper junk mail with just a few clicks. You setup an account, snap a photo of your unwanted junk mail and, theoretically, it stops arriving in the next 6 weeks. I'd say it sounds too good to be true but I have friends who can attest to it actually working. Even better, it's for iOS, Android and Windows phones - everyone can stop their junk!