When comparing Ninja IDE vs Qt Creator, the Slant community recommends Qt Creator for most people. In the question“What are the best IDEs for C++ on UNIX-like systems?” Qt Creator is ranked 1st while Ninja IDE is ranked 21st. The most important reason people chose Qt Creator is:
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.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Syntax highlighting
Pro Extensible
Plugins can easily be created to add features that you may need but are otherwise missing from the IDE.
Pro Virtualenv support
Has out of the box support for virtualenv, which can be added when first starting a project or later through the settings.
Pro Embedded Python console
Has an embedded python console built in.
Pro Script runner
It is possible to run the project or any file opened in the editor with just one click.
Pro Find in files / find usages
Allows you to search one or more words, a regular expression, etc.
Pro Breakpoints
Pro Multi-platform
- GNU/Linux
- OS X
- Windows
Pro Built-in static analysis
NInja IDE highlights both static and PEP8 errors in a file. With each type of error having its own icon.
Pro Web-inspector
Pro Render HTML files
Also supports rendering HTML files currently loaded in the editor.
Pro Project management
Allows you to manage projects, saving descriptions and information about them and letting the user to perform file management related task inside the IDE itself.
Pro Easily locate code
Code locator allows quick and direct access to any file, function or class inside one of the project by simply pressing a few keys. Pressing Ctrl + K
open a popup over a text field, where you can type the name of what you want.
Pro Symbols explorer built in
You can easily see all functions, classes and attributes in the current program.
Pro Written in Python
Pro Bash support
Pro Sublime snippets
Pro Multi-language support
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 Built-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 Supports CMake
Pro Very responsive when compared to similar software
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.
Cons
Con Latest version (2.3) is from 2013
But it looks like the project is still maintained towards 3.0 release.
Con Bad performance
Freezes and slows down often.
Con Poor refactoring
QtCreator has lack of refactoring features. It's not even close to Resharper++ or CLion.

Con Poor multi-window mode support
While multiple windows are supported, many operations will activate in the primary window (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).
