B4X is described as 'Cross platform development tools for native iOS, Android, desktop and server applications.
B4X is a Rapid Application Development (RAD) tool for real world apps.
The programming language is a modern version of Visual Basic' and is a popular IDE in the development category. There are more than 50 alternatives to B4X for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best B4X alternative is Eclipse, which is both free and Open Source. Other great apps like B4X are Microsoft Visual Studio, Apache NetBeans, Android Studio and Lazarus.
b4x is a basic kind of code like visual studio from microsoft but in its own way, while others use java, qt4 is more like a mix of everything probaly the future of all developmet tool in one