Paper introduced by Facebook Creative Labs, it helps you explore, organize and share stories.  Very much similar to the popular Flipboard or Pulse, but with Paper app it allows you to creat and share beautiful stories of your own.
Customization includes  a choice of categories, the first is your Facebook News Feed, but you can add others about various themes and topics, like tech, sports and music, to food, culture and design.  All is displayed in a beautifully designed UI and operated with unconventional and original navigational elements.

Paper will be  available for the iPhone in the US on February 3rd.  See the video below