justWink is a free greeting cards app through which you can send paper cards and e-cards of your choice anywhere, anytime. The app offers a wide assortment of cards for numerous occasions and even lets you create your own customized cards using pictures from your phone gallery.

The app also allows you to send a card via email,  Facebook or even through postal service. You can also get a free gift card whenever you send a card using this app.

Download Link: iOS, Android
Price: Free