I've just been playing with radio.garden. Fantastic. Ended up listening to Radio Rostov which I don't think I would have done otherwise. I especially like the use of static when it's thinking/trying to find a signal. As I've found to my own cost with my own stupid audio projects, silence is a bad failure mode. You don't know if something's trying or broken. Static says 'I'm not doing what you want yet, but I'm doing something".
And the history and stories section are splendid too. Listen to Radio Arthur. Or, in contrast, this.