Is a complete web development environment that combines powerful authoring tools with a collection of online hosting and collaboration services that help you and your team do more, more easily. Discover why Aptana Studio is the choice of savvy developers across the globe:

-Ajax, JavaScript, HTML, CSS
Includes support for jQuery, prototype, dojo, YUI, ExtJS, MooTools and other Ajax libraries.
-PHP
Create, debug, test and deploy scalable PHP solutions eamlessly
-Ruby / Rails
Develop Ruby and Rails apps faster with Aptana RadRails
- Jaxer (The Ajax Server)
Use your Ajax and JavaScript skills to create server-side apps too
-Python
Simplify Python development with Aptana Pydev
-Desktop Ajax
Develop desktop apps for Adobe AIR using your Ajax and HTML skills
-Mobile Web
Create mobile apps for Apple iPhone or Nokia S60 series phones

Home Page:

http://www.aptana.com/