For PHP, I like Netbeans 6.5.1(+) though VS 2010 is to have support for dynamic languages like F# and from what I've heard, PHP could follow. In that case, I'd definitely move to VS
For simple HTML stuff, Notepad++.
For Java, Eclipse/Netbeans are good (and free) IDEs.
For any language under the .NET platform, VS 2008 is good though VS 2010 should be out in April so watch out for that.