Perpetual Motion Publishing has two open anthology calls. The first is a charity anthology called "Bleed" with the proceeds going to the Children's Cancer Fund. They're looking for "allegorical horror stories where the monster represents cancer". Up to 10,000 words with a June 30 deadline.
The second anthology is called "Long Distance Drunks - A Tribute to Charles Bukowski". The deadline for this one is December 31 for stories reflecting the style of Bukowski's writing. 1,000 to 10,000 words. Payment is 50% royalty split.
You can find the details for both anthologies here