As I started doing last year, I've forgone sending Christmas cards. Instead I'm using email and the phone to send my wishes and created a website to share some of our better family photo's. The savings go to charity.
Our chosen charity this year is Room To Read - started by an ex-Microsoft employee after he discovered a lack of books at a school in Nepal. Since 2000, the charity has established over 3000 libraries in the developing world. They also publish local language children's books, build schools and provide long-term scholarships to girls. It's an excellent cause in my books (haha) and their website makes it very clear what they do.
Room To Read has won the Fast Company Social Capital Awards a few times. It's interesting to read what some of the other winners do.