Public Radio Exchange (PRX). I've highlighted several of my favorites in this PRX playlist called Todd Melby's Favorites. There's some great, great audio here, including two documentaries from Jonathan Mitchell, Weenie Royale from The Kitchen Sisters, Miner by Gregory Warner and this really cool love story called From Brooklyn to Banja Luka. Give it a listen.
Make your own list of favorites, send me an email and I'll link to them here.