Here is the one from SitePoint: http://www.sitepoint.com/christmas-sale/
Lots of books & stuff for those interested in web development and design.
Don't worry if you have missed any deals, as they will open all deals again for 1 day, on Monday, December 22, 2014.
In any case, you can sign up to be alerted about each deal, which includes when they open them all up one last time, at the end of the sale.
Disclaimer: I work for SitePoint/Learnable, but they did not offer me any incentive to make this post.