Mystery and Horror, LLC has posted up a new anthology call titled "Undead of Winter". They're looking for undead stories with a winter holiday setting. 3000 to 8000 words, payment is a $5 advance against royalties. The reading period begins August 1 and runs to October 1 so you have plenty of time.
Also they're still taking submissions for "All Hollows Evil" until July 15. You can find the calls here.