Static Movement publishes a ton of anthologies but I rarely post them because this is a non-paying market, but...you knew there was a but coming didn't you? I decided to post this one because finding markets for straight crime fiction isn't always easy. This anthology is titled "Hardboiled" and you can find the details here
Their calls are always posted to the forum but I've included the link to their web page if you want to check them out. There are plenty of open calls here for folks who write in the Horror genre and don't mind a non-paying market.