SomaFM

SomaFM is a network of internet radio channels based in San Francisco, and it is commercial-free and listener-supported. When you arrive, you get a menu of channels with distinct personalities: ambient, space music, deep house and more. Pick one and the stream starts, with no ads interrupting the music. It is an easy way to find new music while you work, since each channel keeps a consistent mood and the human-curated playlists tend to hold surprises. Because it is supported by listeners rather than ads, the site asks for donations, and you can contribute if you like what you hear. If you want a calm focus soundtrack, try one of the ambient channels; if you want something with more beat, try a deep house channel. It is a durable corner of the web for people who like radio with character.