She designs a whole line of geeky cards and stickers and sells them in her Etsy shop, Word to Your Unicorn. These are some of my favorite styles in her store:
Even though I see a lot of geeky note cards and postcards online, these stand out from the crowd. I love the bright colors and cute designs on cards like the Pac-Man ones, and I like the classy prints on the Game of Thrones and Firefly cards. She has a plethora of other styles available in her shop. Go look around and make someone's day by sending mail!