miniRadio allows anyone to listen to free online radio streams easily
With miniRadio you can either choose from one of the predefined stations or add your own and listen to them. The application uses only very little screen estate and memory and is therefore ideal to run in the background even on older Macs.
Supported formats include Icecast (used by SHOUTcast), MP3 and WMA streams. Basically anything that works in QuickTime should work with miniRadio. You may need to install Microsoft's Windows MediaÂ® Components for QuickTime to listen to WMA streams (free download from Microsoft).