I think Halloween has to be one of the most fun celebrations to stitch for, so I couldn't just mention one Halloween pattern -
Badbird's Batty Framed was stitched beautifully by xperimental, the pattern is by Badbird and can be found here.
Halloween Cross Stitch Wall Hangings were stitched by Early Bird Special from patterns by My Paper Crane which can be found here. These wall hangings were stitched on plastic canvas with acrylic yarn and you can read more about them on the Early Bird Special blog here.
progress 9/24/11 was stitched by Kunderwood from a Lizzie Kate Halloween pattern and I've been following Kunderwood's progress shots eagerly on Flickr recently.
Also worthy of Halloween pattern mentions are Zombies and Monsters from Sublime Stitching and Urban Threads Halloween selection, both of which I've been using as I prepare for my own Halloween celebrations. I haven't stopped stitching yet however and plan to stitch something from this great new Halloween pattern set from Cate Anevski and hopefully of course Feeling Stitchy's very own Halloween pattern from Cathy Gaubert.
Spooky stitching everyone!