emblibrary has a witch on broom in front of the moon; stitched them on a table cloth; gorgeous :o) They have 3 sizes.
CUTE embroidery has one called halloween03
Ruth has a super one, I have made this one on a T-shirt and love it
http://www.embroidery-by-ruth.de/
There are many other lovely freebies on her site. It was new to me so I looked around. thanks.
At OPW/ Abigail Michelle you find a really beautiful one (stitched it for halloween, looks beautiful).
Or on Urban Thread a modern one :o)
And a freebie on EmboiderThis (they have so wonderful designs).
I have a whole folder just with halloween-designs maybe I find some more (even when I still remeber where I get all the freebies *lol*).