Here's a list of some Free Christmas Song downloads that I've come across, I hope these help you get into the holiday spirit.

God Rest Ye, Merry Gentlemen

Hark, the Herald Angels Sing [feat. Aygun Beyler and Mahsa Vahdat]

O'Carolan's/Welcome Christmas

Why Can't It Be Christmastime All Year

Christmas With A Monkey

It Came Upon A Midnight Clear

Good King Wenceslas

Hark! The Herald Angels Sing (Remastered 1997)

Deck the Halls

O Come, All Ye Faithful (Digitally Mastered May 1990)

Panis Angelicus

Silent Night, Holy Night

Pat A Pan

Christmas Tree

I Heard The Bells On Christmas Day

Silent Night

That'll Be Christmas

What Child Is This?

Why Can't It Be Christmastime All Year

Make sure you click the preview button beforehand as there are some songs that may not be for everyone.

If you didn't find enough there to get you in the Christmas mood check out these 2 sites for some more music.

Christmas Music #1
Christmas Music #2