Podbird lets you easily search for new podcasts, and either stream them or download them for offline listening. Licensed under GNU GPLv3, for Ubuntu Touch.
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Bitcast.fm Alternatives
Bitcast.fm is described as 'Meet Bitcast.fm - a new bespoke podcasting app built specifically for the worlds best tech podcasts. Connect to Twitter to clap, tag and discuss' and is a Podcast Player in the audio & music category. There are more than 50 alternatives to Bitcast.fm, not only websites but also apps for a variety of platforms, including iPhone, Android, iPad and Mac apps. The best Bitcast.fm alternative is Pocket Casts, which is both free and Open Source. Other great sites and apps similar to Bitcast.fm are TuneIn Radio, Playary, gPodder and Apple Podcasts.