GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
PyQt - Riverbank | Software | PyQt | What is PyQt?
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
wxWidgets - wxWidgets: Cross-Platform GUI Library
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft