I'm a web developer, i write php, html, css, js mainly. So IDE's are totally unnecessary. I have a development server i connect to via sftp and edit on that, i use dropbox as my source control since 99% of the time i'm a single developer and it stops me having to remember to check anything in. It also makes deployment to live pretty easy too.

I dont use any external plugins or anything, everything i use comes out the box with gEdit, the file browser side pane, highlighting, indenting and thats about it. I imagine its a lot easier from a web dev's perspective than from actual programmers.