Qt Creator is an easy to use and well designed IDE to code your Qt C++ and QML projects. It has world class
CMake support and is pre-configured for Qt C++ development. Due to its excellent C++ support it can also be used for any other vanilla C++ projects.
Hmm, I just realized I have not used debugging a lot. I hope this is a good sign. Need to ask someone to help me out here. In the meantime have a look at the Qt Creator documentation (opens new window).