I just finished creating The Spellcatcher http://spellcast.in
It is for Windows PC desktop-laptops. It reads both ATOM & RSS feeds. It comes with a default list of podcasts built-in, so the first-time user can immediately see that it works, and try out the podcasts I like.
Most podcatchers will download the entire back catalog of episode enclosures when you add a feed. This causes your computer to work for days, clogging your internet connection the whole time. The Spellcatcher has a "no-podcasts-older-than-date" field, so that it can suppress the downloading of old shows. This one feature alone completely justified the time and effort I spent in creating it.
And I made some features that help podcasters measure downloads, place promos in other podcasts, and make it possible for the small podcaster to sell podcast ads for the first time. But the user base needs to grow, as The Spellcatcher is brand spanking new, 2012-10-29 . . . . .
The Spellcatcher seems to be the only podcatcher under active development right now that is made to meet the needs of podlisteners, podcasters, and podvertizers. The others all have some problems with them I'm busy trying to fix. I invite you to join me in the adventuresome endeavor to improve the infrastructure of podcasting itself!
Questions? Bugs? Feature Requests? firstname.lastname@example.org
Thank you, Ace Frahm