Earlier this year I updated my Kris Kringle spreadsheet. I wrote this automated spreadsheet many years ago and I use it every year for our family Kris Kringle. Basically what it does is it allows you to add a list of names, and then generate a unique email to each person telling them who to buy a present for. No one needs to know who is buying for who. Not even the person setting up the event.
Here is a link to the latest version of the file.