CAFOD have published their annual Advent calendar and other resources here:

"Resources for Advent, including our Advent calendar and Advent Celebration of the word."

BustedHalo have published their Advent resources here:

"Our digital twist on the traditional Advent calendar brings a sense of surprise by showing you the whole calendar, but not letting you “open” each day ..."

Please make sure you click through to read the full posts and see all the resources available. 

Photo by Daniel Seßler on Unsplash