6. Cell Phone Spy

Image Credit

With people keeping so much of their important personal information on their phones these days, this one could expose an incredible amount of information on whatever unfortunate person becomes a target of someone with one of these. All you need to do is plug the device into the phone and then access a special website to enable the spy software. After that, every phone call, text message or email message can be accessed through the website without the knowledge of the person using the phone.