This is a big list of podcasts for learning many languages. If you want specific podcasts for your target language, please select the language you want and go from there.
Podcasts are basically audio (and sometimes video) files that you can easily subscribe to using a mobile device. The actual podcasts themselves take on may different formats. Some are produced like high-quality radio shows, some are basement productions about local events or interests, others consist of music and still others regard just about anything you can imagine, such as language learning.