It took 45 iterations and over three years, but the team at Adobe finally released the first OFFICIAL version of Brackets, and it is AWESOME!
What the Heck is Brackets?
That's right! Brackets is one of the few code-editors that offers REAL live-previewing of HTML & CSS changes. You preview your current document in your browser in real-time. It's much faster than having to save all your changes, open your browser, and refresh your page. With the speed and intuitiveness of Brackets, you can have a UI design, or a navbar, or just a cool animation up in running in a matter of minutes.
Where Can You Get Brackets?
Brackets is available for download on all modern operating systems. You can download stable releases at the Brackets website. Or if you're a bit more code-savvy, you can check out the Brackets GitHub repo for up-to-date revisions and documentation.
Personally, I have been using Brackets for the past year, and it has been amazing for quickly creating quick mock-ups and sharing ideas for functionality with others. It's also updated very often, with updates coming out sometimes every week. Bugs are few and far between and even when there is the occasional hiccup, the awesome community supporting Brackets can offer friendly advice and fixes for any issues you may have.