mppatterson | 11 years ago | on: Ask HN: What do you listen to while coding (and how)?
Surprised no one has mentioned Focus at Will (https://www.focusatwill.com/). I've had huge productivity boosts while listening, whether it's programming or writing emails. The free version is nice, but the paid version is really worthwhile since you get a much wider variety of music (it adds an "intensity" option to each genre).