I usually create my own cards.
This is our card from last year:
I used Mari Koegelenberg's Jubilee kit and used Truly Blessed Design's (Marsha) template.
The year before that I made cards with buttons. I made the buttons look like Christmas balls. It was quite easy. I glue the buttons on the card and used a black pen to make the hooks. Unfortunately I do not have a photo of the cards.
Here are a few Christmas cards made with buttons for some inspiration: