Gedit for me. It's nice gvfs integration makes it working on websites much easier.

Where's Kompozer? (the updated NVU)

KKylix & Lazarus
 

Rumor has it that there will be a Borland Kylix in 2010.
Lazarus is available for Linux, Windows and Mac. What more would you want?

Amen, brother.

w00t! No Kate? The code completion is great. Call it a love affair.

Netbeans - Eclipse
 

I tried Zend Studio for working with ZF... Wow, never been so unhappy with a piece of software! Cost me many hours moving my code around without my asking, etc... very, very buggy!

I voted for Netbeans as I think it has more potential for me, than EclipsePDT, but those are the two I'm currently struggling with ;)

I just started using PDT2 and it seems better than the last but I haven't used it as much yet. And I might not be if Netbeans continues to impress me. Although I like the idea behind Eclipse and it does work as well as anything I've tried!

I very much liked Komodo but its support for code completion with frameworks was lacking last time I tried almost a year ago so it wasn't what I was looking for... Komodo Edit is handy however but typically I just use gEdit for quick edits as I can SFTP with it.

Let's see, it has keyword completion for C, C++, gawk, and Python, I can (re)compile my code by pressing F5, open a remote debugger with F6, and it has a diff mode.

Huh, that's pretty much all I need in an IDE. Go figure. :D

Thus, Vim it is for me.

Eclipse, though Ganymede has too many bugs, Europa was much more stable.

I actually use Notepad++, but perhaps that's only available on Windows.
Apart from NVU I prefer Kompozer though...(again,might be only available for Win.)

Also, Vim scripting has lexical scoping without extra effort - unlike Emacs.. And there are a lot of obviously development-oriented scripts for it. So how again Emacs is an IDE if Vim is not?

Netbeans 6.5 ... don't leave home without it.

Eclipse, no doubt! Improving so much. Runs like a charm on different distros. For C++ people, old and new, even experienced VS users, Eclipse is just great!
I have also tried KDevelop, because I was told it supports C++ development especially well, but I am so disappointed. I could not go to the definition/declaration of a class by pressing some key, code auto completion only worked for user defined types. When I pressed F1, the khelpcenter could not be lauched.
But I like KDevelop's interface layout, just like VS's. Hope KDevelop can be improved greatly when Version 4 comes out.
Thank all people who have contributed to build so many wonderful IDEs!

Any one used SharpDevelop? Really good alternative on windows. Maybe next time it can get a mention in the polls.

Eclipse ... The People's Favorite!
:)

debian

You have to admit that including Emacs but not Vim year after year is just asking for this discussion.

How about requesting disqualification of Emacs for a change? It's an editor, for heaven's sake; how on earth can anyone think of it as an IDE? [insert more rants]

Emacs has an intergrated GDB shell for one and it can do source control and stuff, so its more of an IDE then Vim