Sansync is a simple Podcast downloader and mp3 player syncer. It has support for any filesystem based personal media player, such as the Sansa players. It also has support for password protected podcasts.
There are binaries for Mac and Windows available.

A podcast is a series of digital media files (either audio or video) that are released episodically and downloaded through web syndication.

The license of this software is Free, you can free download and free use this internet radio software.