A free printable 2010 desktop calendar here from Ruffled.
Another free printable advent calendar here from How About Orange.
Here is a tutorial on how to make the advent calendar shown below, from Gingerbread Snowflakes.
Lots of calendar ideas from Decor8 here.
Love this pretty matryoshka calendar, a free download, from A Print a Day. See one image below.
Poppytalk has a whole lot of calendar ideas for you here.