The hats....

http://www.renderosity.com/mod/freestuff/download_item.php?item_id=62815

http://www.evilinnocence.com/morphing-santa-hat-for-v4.html

 

Several free holiday trees also in free stuff section here, but my favorite one is here...

 

http://www.ageofarmour.com/3d/free/Christmas.html