http://www.lightningrobotics.com
When I first started coding this I used only Notepad. It is completly hand writen php/mysql. Text files are really hard on the server and can be very slow. Mysql works for our uses. I like it.
As the site started to grow we got many more pages, and haveing 18 instances of notepad open just didn't work. I got a copy of dreamweaver and use it as a text editor. I only use it because it has tabbed files and Ctrl+S saves. Very useful to switch back and forth between files. The syntax hylighting isn't all that great, and doesn't do html highlighting in echo tags to its pretty useless. So, its still a notepad of sorts, with so many functions i never use. I still write it all by hand to keep the code clean. Front page turned me off to any cookie cutter programs.
Duke13370 now webmasters the site and i'm not sure what he uses, but i'm assuming a text editor of some sort.