This is the coolest Ajax IDE on the block the cool features are auto code completion for both css and javascript even for user defined functions the IDE is built for ajax it comes with the following ajax frameworks to base your ajax projects on mochikit,jquery,yahoo UI,prototype,rico,dojo,Aflax
And scriptaculous.
What can I say if you are into web 2.0 programming or just planning to start then this is a wonderful companion to have during your journey.
Well where is the sexiest companion I was talking it can be found at
http://www.aptana.com