Bad Day Books, an imprint of Assent Publishing is hosting a no fee "Rogue Writing Contest". Until October 31 they are accepting novel and novella submissions in the subgenres of horror that include thriller, suspense, and apocalyptic. Novel length is 70,000 to 120,000 words and novella 40,000 to 50,000. There are six prize packages. You can find all the details here.
There's also more information here.
Hat tip to hellnotes.com