So I am always trying to find a better HTML/JS/CSS code editor, having used Dreamweaver, Sublime Text and WebStorm over the past year, and now we have Brackets.
Apart from that, Brackets doesn't offer much, for now. There is no code auto-completion of any kind, as this editor is still in its infancy. And hopefully at some point, it will have 3rd party library support as well. You can actually recommend features or vote for exiting ones here. But it will be growing from week to week, so I recommend, checking it out from time to time, or even contributing to the project if you can!