This started as a CSS-only side project, got some traction on Hacker News and is now one of the finest looking and working pieces of documentation for web development I've ever come across.

I dunno why this fascinates me

Prettier and now powered by Ruby on Rails

There's a bunch of stuff I've missed in "The Half-Blood Prince", I need to give this a look-see

Links to stuff to make you more productive on your Mac

Or, anyone researching anything [via /popular]