May 13, 2014 - P.S. Card Keeper is a new application that stores & organizes greetings cards from all of life's special occasions. A dream for eliminating the stacks of cards in corners and drawers in one's home. Easy-to-use and beautifully designed, P.S. Card Keeper is a no-brainer app for anyone that receives greeting cards and struggles over throwing them away or storing them in a shoe box. Now you can cherish your greeting cards for years to come by digitizing them with this simple and useful application.