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 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 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.
Pro Fast and fully keyboard-navigatable
Responsive UI, no need to use the mouse for the power users.
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 Supports CMake
Pro Very responsive when compared to similar software
Con Errors only show on compilation
No default precompiler for early error checking.
Con Poor multi-window mode support
While multiple windows are supported, many operations will activate in the primary window (search, debug, goto-line... 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).