Shock Totem has produced some amazing looking magazines (have a look when you click through to the guidelines):
We consider original, unpublished stories within the confines of dark fantasy and horror—mystery, suspense, supernatural, morbid humor, fantasy, etc
They accept fiction up to 5,000 words, but also flash and micro fiction, and pay a healthy 5 cents per word, up to a cap of $250. They're also looking for poetry and will sometimes grab reprints at a reduced rate.
Non-fiction about real-world horrors up to 2,500 words is also accepted.
Shock Totem has two reading periods during the year, From February to May, and from August to November.
Check it out here: http://www.shocktotem.com/guidelines/