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 Microsoft Visual Studio. It's not free, so if you're looking for a free alternative, you could try Microsoft Visual Studio or Eclipse. Other great apps like B4X are Android Studio, Qt Creator, Lazarus and Code::Blocks.