I’ve never seen anything better than Visual C++ 2010 so far.

Code::blocks. I like it, but if you want to debug you must create a project (sometimes it is annoying), so I always set up 5 projects before a contest (one for each task)

Java + Eclipse is my preferred combination, but when I want to use C/C++ for some reason, Geany is my choice - lightweighted, small, simple and fast enough.

Vim

Visual Studio 2008 Express, because 10th Studio is quite slow on my computer.

Dev cpp with personalized color preferences!

Well, when I have my laptop I prefer Kate mainly because I got used to it (but vte, file templates and some other plugins rulezz). Eclipse is good for me as well.

On Ubuntu, Geany works fine with g++ (no debugging).

I think This Link will Help .

Под Линухом использую Vim,

Vim all the way! (and gVim)

Mac OS X with gedit

I use Gedit and Emacs and compile via terminal. I think that there exist Emacs for Windows too. A lil hard to get used to, but worth it. While Gedit is really easy to use. Also you can add some great plugins to both Gedit and Emacs.

i think best choice is GVIM;

Emacs, it is quite good with gdb running from inside it.

For C/C++ I prefer Code::Blocks both on Windows & Linux. Used Dev-C++ before.
For Java my choice would be Eclipse.

Visual C++ 2010 is brilliant, but its speed of compiling is not good. I recommend Code::Blocks!

I am using gEdit + Terminal =D

During contests I just use jEdit to edit code with syntax highlight. To run code, I have a folder where I place my solutions that has a script called runcpp.sh, which takes a source file name as argument the script just calls g++ to compile and if it succeeds runs the executable it just created.  I just run that script from a terminal.

To debug, I don't really need or like step by step debuggers. But I use valgrind whenever I get seg faults. It will just quickly find the line number that is corrupting your memory.

I generally find IDEs to be more problems than are worth for me. And for contests, you really don't need much features, and many features that are good for app development get in your way.

I choose jEdit because it has an auto complete plugin which I never use. But mostly because of some practical reasons not very related to contests.
- Very customizable. This is the reason I used to use vim, but I found its interface to be more of a load than something that helps. So I then searched for a replacement that was as flexible in configuring visual themes and also in adding new languages. Theming requires plugins, but it is all right.
- The ability to add custom languages. I don't have time to learn to use and configure a different editors for each different language I use. It gets worse when you create new languages.
- Cross platform and open source: To me, these two are the utmost basic requirements for any software I would have to endorse. Cross platform means I don't have to be locked to an operating system just because it is the only one that runs an applciation. Open source is a guarantee that if the people behind the software go missing or begin getting odd ideas, other people will be able to replace them.

In topcoder SRMs, I just use a slightly modified version of KE, it runs code in a terminal window.

I used to use Code::Blocks but I've been using GVim for quite some days now! :-)

My current favorite is Code::Blocks. It's sleek, highly customizable (without the onslaught of features being overwhelming to the senses), and user friendly. The debugger, however, is primitive to the point of being insanity inducing.

Linux:

Only vim/Gvim .... :D

for windows and linux OS i am using eclipse with CDT client. it is fast, and reliable. also it is auto complete is very good and you can adjust it to use your GCC with is the standard in a lot of contests, but when i need to debug i switch to visual studio because it is better in debugging as it views maps and vectors,... in better way than gdt.

I always prefer Visual C++ 6.0 cause I used to it.