Komodo IDE 4.0 is the first unified workspace for
end-to-end development of dynamic web applications. A
rich feature set for client-side Ajax languages such as
CSS, HTML, JavaScript and XML, coupled with advanced
support for dynamic languages such as Perl, PHP,
Python, Ruby and Tcl, enables developers to quickly and
easily create robust web apps.

Award-winning features include comprehensive editing
and debugging, plus intelligent tools for regular
expressions, team development, customization and
unparalleled extensibility. The result is a powerful
coding environment for framework stacks like Ruby on
Rails and CakePHP and client libraries such as the
Yahoo! UI Library and Dojo.

http://www.activestate.com/products/komodo_ide/