According to the website, it does everything:
It isn't free/opensource, but it says it's fully Linux compat, so maybe we're making headway after all.Unified Editing for Web Apps
Aptana Studio's editors provide world-class HTML, CSS, and JavaScript code completion, reference, and validation at your fingertips.
Ajax and JavaScript Libraries
Get unrivaled support for popular libraries including jQuery, Prototype, YUI, dojo, Ext JS, MooTools, and others.
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Add powerful plugins and ready-to-use runtimes for PHP, Ruby on Rails, and Python. Add Studio to Eclipse for Java.
Desktop Ajax
Use your skills to create desktop web applications with our plugin for Adobe AIR.
Free, Open Source and Cross Platform
Download Aptana Studio for Windows, Mac, or Linux. Both the standalone and Eclipse plugin distributions are free, open source software.
Yeah, it's in there.
Multi-browser previews, SQL database tools, an awesome JavaScript debugger, server tail views, and tons more.
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