Here is a fun, interactive open source holiday card that you can modify and share with friends, courtesy of Protecode.
Courtesy of the folks at Protecode, a code attributes management company, the open source card pictured below is free for you to share with friends. Follow the link to the interactive card and click the packages under the tree to open them. A link is provided to download the source code, which you can modify as you like to share with friends, co-workers, and family. This card is licensed under GPL 2.0.