java
sql
php
iphone
c
xml
ajax
mysql
database
xcode
android
objective-c
multithreading
perl
algorithm
facebook
cocoa
delphi
dom
I'm a CF Developer that has been playing with intelliJ of late! I must say I do love the smoothness of intelliJ. IntelliJ does has have a CF code library ( http://plugins.intellij.net/plugin/?id=3571 ).
I don't use Eclipse for CF Development, but do use CFBuilder, which is based on Eclipse.
I personally prefer intelliJ as an IDE, but prefer CF Builder when working with CF.
There are two options for working with Eclipse for ColdFusion Development:
There is also a plugin for IntelliJ which I have no personal experience using however I note that some highly respected CF devs are using it and preferring it to the Eclipse-based options.
My team and I currently use CFBuilder 2 and find that to be good enough for our needs. The biggest criticism I see about CFBuilder/Eclipse is that it can perform poorly on older PCs and the common solution is to increase the RAM available to it.
The benefit my team finds with CFBuilder is that the full Eclipse plug-in ecosystem is available giving us bundled options for source control and other development tools. (The same may exist for IntelliJ but I have no personal experience with it.)
Dreamweaver, especially a recent version, is an option and many CF devs swear by ColdFusion Studio which is a very old program and might be hard to get your hands on. Finally, there is also a plugin for Notepad++ for the times where you need to make a quick edit to a file and don't require a full IDE.
The editor that a lot of people have been using for ColdFusion lately is SublimeText 2 (http://www.sublimetext.com/2) with the official ColdFusion Package (https://github.com/SublimeText/ColdFusion). The link I posted below from Nettuts will help you get up and running with the PackageControl package that makes installing the ColdFusion package very easy.
Sublime is lightweight, powerful, and a pleasure to code in. It has small animations that make it feel responsive, and the birds eye map view of the code can be very useful. It even has some code insite that I find really helpful.
Heres a great post on Nettuts to get you started: http://net.tutsplus.com/tutorials/tools-and-tips/sublime-text-2-tips-and-tricks/