When it comes to programming, which developers do you closely follow?

Please include blog/website/github links.

A couple of my favourites:

[TJ Holowaychuk](https://github.com/tj) - because he's a wizard. The number of premium open source projects he's been a part of, is just astounding.

[Dan Abramov](https://github.com/gaearon) - First hit on his redux talk, then drifted to his blog posts. I like his clarity of expressing the why's and how's.