Adobe Systems: All major applications are developed in C++: . .Photoshop & ImageReady, . .Illustrator, . .Acrobat, . .InDesign, . .GoLive, . .Frame (mostly C, some C++) Autodesk: A large number of major number of application in the CAD domain. Siemens: Major medical systems (often using ACE for convenience and portability). |
Your terminology misuse has us all confused a little now. I think you mean GUI (Graphical User Interface) when you say IDE (Integrated Development Environment). |
Trolltech makes its money by selling exactly what you are asking about -- many beautiful, functional, cross-platform GUIs were made using Qt. |
All of these systems involve complexity that you don't recognize yet. |
For example Visual Studio (since VS 2012) front-end(GUI) is written in WPF while the compiler, linker... is written in C++. |