Because there really is an app for everything.
For the iPhone:
Christmas carols by iChristmas ($.99) has music and lyrics for more than 100 carols. The stocking stuffer? It includes a shakeable jingle bell for those times when your impromptu "Jingle Bells" really needs some sound effects.
Countdown to Christmas ($.99) is a stopwatch to the big day. Plus you can e-mail friends so they can count down, too.
Christmas Snowglobe ($.99) lets you control your own snowstorm. By dragging your finger across the screen, you add more snowflakes and decide which way they fall. You can use one of three scenes: a Christmas tree, a snow bunny or a snowman. Or make your own snow globe with any picture on your iPhone.
And for BlackBerry:
Santa Tracker ($1.99) allows you to follow the big man as he flies across the globe.
Slacker Radio (FREE) offers some holiday music channels and a sleigh-full of others.