Qt Creator is a full-featured cross-platform IDE for C++ programming (with or without the Qt libraries). Primarily intended for use with the Qt toolkit, but usable for general C/C++ development too.
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Pro Great syntax highlighting and auto-completion
Qt Creator has a code model which basically has the same information as the compiler. So it can do really nice syntax highlighting (e.g. of virtual methods or local variables) as well as provide great code completion.
Pro Fast and fully keyboard-navigatable
Responsive UI, no need to use the mouse for the power users.
Pro Supports CMake
Pro Integrates well with non-IDE workflows
Qt Creator uses normal .pro-files, CMakeLists.txt, Makefiles.am, etc. for its projects and rarely needs special configuration for projects.
Projects can be built on the command line as usual.
Pro Much space dedicated to the code
Small and beautiful UI, almost all the space is dedicated to the text with hardly and toolbars. Can actually be used on a 1024x768 pixel screen.
Pro Very responsive when compared to similar software
Pro Build in Qt GUI editor
Allows for the creation of a window based ui in a graphical editor, no code required to build the ui.
Con Poor refactoring
QtCreator has lack of refactoring features. It's not even close to Resharper++ or CLion
Con No support for recent C++ standards
Totally outdated, still doesn't support C++11 features such as auto statements when using "Find Usage", etc.
Con Qt Focused
Qt Creator is focused on being an IDE for Qt, as a general purpose IDE it performs quite well, but there are areas which are lacking such as project file support (support for generic/CMake projects lags behind Qt projects).
Con Poor multi-window mode support
While multiple windows are supported, many operations will activate in the primary window (debug, goto-line... etc).