Rhythmbox has an FM Radio plugin that lets you configure radio stations and tune in to them the same way you'd pick other media. You can enable it from
Plugins, and then add new presets with
New FM Radio Station.
It depends on proper
video4linux drivers for the tuner hardware, and expects that the card will handle getting audio to the speakers. I've used it successfully with a tuner that connected through to the line in jack of the sound card. It was necessary to turn on unmute that input with
alsamixer -c0 so that the audio passed through to the speakers, but other than that it worked fine.
If your tuner card handles audio in some other way (e.g. it doesn't have a direct connection to the sound card, and instead shows up as a separate sound device), it might not work out of the box though.