I just use dreamweaver most of the time.
Coldfusion builder is nice too but I am assuming you are using php.
I think it's pretty much Eclipse, which you may like.
A lot of php developers are enjoying codeigniter.
http://codeigniter.com/
I think I used notepad ++ when I was in college a while ago doing some kind of software programming courses i think? I don't remember if that was it but it did the job.
Best of luck