JetBrains said WebStorm is known by some developers for "reading your thoughts," or anticipating the developers next step. This release includes that capability as well as it includes support of the newest features in the popular scripting language ECMAScript Harmony release. WebStorm 4.0 adds new functionality onto the WebStorm platform, which was most recently updated in December when JetBrains delivered WebStorm 3.0. WebStorm 3.0 added support for CoffeeScript and Node.js, among other things.
JetBrains WebStorm 4.0 is available as a free 30-day evaluation, and no registration is necessary.
JetBrains is widely known for its Java IDE, IntelliJ IDEA; PhpStorm, a PHP IDE; RubyMine, a Ruby and Rails IDE; and YouTrack, an issue tracker, among other technologies.