The best replacement for qt creator is visual studio.

The best alternatives to qt creator are rated as following:
★★★★★  visual studio
★★★  kdevelop
★★  codeblocks
★★  qt designer
★★  xcode
★★  codelite
★  carbide
★  eclipse cdt
  code blocks

Your alternative for qt creator is not listed? Suggest!
Speaking about qt creator, one probably shouldn't forget about pyqt.

Other search terms related to qt creator and their ratings are:
★★★★★ pyqt
★★★ cmake
★★ qt5
qmake
You have in mind a companion for qt creator and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of qt creator in all years. Click on graph for more.
qt creator
visual studio
kdevelop