Aptana web IDE

Wonderful web IDE, its very useful for HTML, CSS and JavaScript creating, so I hope it helps the java and .net groups.
http://www.aptana.com/
Wikipedia:
Aptana is a cross-platform, free and open source JavaScript-focused Integrated Development Environment (IDE) for building dynamic web applications. It includes coding assistance features for JavaScript, HTML, and CSS languages, an outliner of JavaScript, HTML, and CSS code structure, error and warning notification and the possibility to customize and extend the UI.
Besides standalone versions for Microsoft Windows, Mac OS and Linux, Aptana is available as a plugin for Eclipse — Aptana is based on Eclipse.
It is also possible to configure Aptana to edit PHP, ASP or other not (yet) supported file types