Things possible in IntelliJ that aren"t possible in Eclipse?

I have heard from people who have switched either way and who swear by the one or the other.

Good JavaScript IDE with jQuery support

I'm planning to start learning jQuery (among other things), so I'm looking for a good Javascript editor that can preferably provide some of the following features:

Any good PHP IDE, preferably free or cheap?

Does anyone know of any good IDE (Code completion, Syntax coloring, etc) that will handle php. Looking for anything that might be relatively cheap or free and doesn't run like crap (IE: Eclipse)

Do you keep your project files under version control?

Do you keep project files like Eclipse's .project, .classpath, .settings under version control (e.g. subversion)?

Eclipse: Set maximum line length for auto formatting?

I am working with Java. If I hit Ctrl + Shift + F in Eclipse Helios, it will auto format my code. At a certain point, it wraps lines. I would like to increase the maximum line length. How can I do this?

Eclipse as an IDE - What do you find missing as a beginner in Java?

I am working on a solution that aims at solving problems that newbie programmers experience when they are "modifying code" while bug fixing / doing change requests, on code in production. Eclipse, as we all know is a great IDE. Features such as Code Completion, Open Declaration, Type Hierarchy, Package Explorer, Navigator, Finding References etc aids people in fixing things quicker compared to say using something like Textpad.

Hidden Features IntelliJ IDEA

Just another Hidden features and tips and tricks WIKI .

After seeing the hidden features of eclipse, java, spring framework I thought we need to have a list of the features, TIPS for IntelliJ too which is the best and the Intelligent IDE available for java.

IDE for JavaScript development

What do you suggest for JS development IDE. Is there something similar to VisualStudio IDE, so I can run/debug my application in it?