Aptana - Web development IDE

Aptana Studio harnesses the flexibility of Eclipse and focuses it into a powerful web development engine. It helps to build web applications quickly and easily. It could be downloaded as Eclipse plugin or standalone.

It supports popular JavaScript libraries and frameworks such as jQuery, prototype, scriptaculous, Ext JS and more. It supports Java, Python, PHP, Ruby based development. It has all features required for an IDE like file / project browser, Debugger, Code assit, Code Search and lot more.