(sources and some DIY instructions at the end of the post.) And without further ado...
DOORBELL WITCH: Idea from pinterest. I cut out the hat and cloak from black cardstock, and cut out a hole for the doorbell. The head is a foam circle I found, but cardstock will also work. The broom is made from a dowel cut down to size, and a length of kraft paper that I cut a fringe into and glued around the end of the dowel.
ORIGAMI PUMPKINS: see bottom of this post.
FRAMED SIGN: see #3 here for original sign. Frame from Aaron Brothers.
WINDOW SILHOUETTES: Ideas from here, cut from black butcher paper and taped onto windows. 100 count orange mini lights from Target for $3.50 each, and hung up with washi tape.