I have Podcast Addict, I think its free but I paid a few dollars because of the great selection of settings and options I never knew I needed.
(For example I have it configured so that after 5pm the Sleeptimer automatically makes the podcast fade down and pausing after 10’ of listening, unless I move/shake the phone during the fade down-part, then it extends for another 10’. Perfect for using it in public transport or in bed and dozing off.)