Qt Creator is a cross-platform C++, JavaScript and QML integrated development environment which is part of the SDK for the Qt GUI Application development framework. Developed by Qt Project
License: Open Source
B4X is a user-friendly development environment focused on rapid mobile application development with an easy learning curve, making it ideal for beginners and small projects. In contrast, Qt Creator is a more powerful framework suited for complex desktop and embedded applications, offering extensive features and customization, but comes with a steeper learning curve.