Have Spotify? Guess what? Over four million songs have never been streamed on the service. But that's all going to end because of Forgotify. The service queues up stuff that's never gotten a spin and will create a running playlist of all the unknown tunes.

Once you've heard something on Forgotify, no one else will have the opportunity; by nature of the service, your listen ousts it from the lineup. Better start listening to now!