Brackets is a new comer for code editor for HTML, CSS, and Javascript web development published and maintained by Adobe. It's built based on these technologies too and it's open source just like them. Brackets is published under the MIT License so many developers can join and contribute to this project and make it better.
Brackets ideas:
FOR THE WEB, BY THE WEB
Brackets is built using HTML, CSS and JavaScript. If you can code in Brackets, you can code on Brackets.
OPEN DEVELOPMENT WORKS
Brackets, is a fully open-source, community-driven project. Want to influence its direction? Join the developer list and start contributing.
TOOLS SHOULDN'T GET IN YOUR WAY
Rather than clutter your workspace with floating panels, toolbars and icons, Brackets focuses on providing “Quick Edit” in-line views that provide context-sensitive access to your content, without taking you away from your code.
WORKS WITH YOUR BROWSER
The browser is your design view. Brackets hooks up directly to the browser, allowing you to design and develop in the same environment that you deploy.
Brackets is under heavy development and still needs more contributors. Recently, there are only two ready-to-run versions available for Windows and Mac (no Linux yet), but the development for Linux is on its way.
Demo video:
Regards :)