iPlayer Radio - everyone knows the iplayer for TV, the radio app is also great

There is a lot of world class programmes on iplayer for radio, especially useful are the one demand and podcast features.
- Listen live to all BBC Radio stations
- Browse hundreds of on-demand programmes
- Download podcasts to listen on the go

Here is the PC version
http://www.bbc.co.uk/radio

There is also a great app for iphone and ipad
https://itunes.apple.com/gb/app/iplayer-radio/id560458506?mt=8

Here is the android version:

https://play.google.com/store/apps/details?id=uk.co.bbc.android.iplayerradio&hl=en_GB