Strange Horizons is a freely available online speculative fiction zine that also publishes nonfiction and poetry. They publish a variety of styles of stories and have regularly attracted award nominations in recent years.
All of the stories and poetry in the zine are published in the podcast.
Beneath Ceaseless Skies continues to be a great source of fiction set in a secondary world. This list encompasses all of their podcasted stories since my last list in March of 2011, about 38 episodes. Keep in mind that they only podcast about half of their stories, so check out their text if you want to get the full backlog.