Brackets is an editor for Web development written in HTML, CSS and JavaScript, created by Adobe Systems. It is free software licensed under the MIT License, and is maintained on GitHub. A 1.0 version has not yet been announced, but new preview updates are released roughly twice a month. Brackets is available for download cross-platform, on Mac, Windows, and Linux. Brackets supports extensions for adding extra functionality; currently available extensions add support for debugging, browser-specific CSS prefixes, JSDoc annotations, and other functionality.