Simply FortranSimply Fortran 
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Simply Fortran (fwin.exe). Simply Fortran is an integrated development environment (IDE) specifically intended for Fortran programmers.
Simply Fortran is a powerful integrated development environment (IDE) tailored specifically for Fortran programmers. With its built-in compiler and graphical debugger, it simplifies the coding and debugging process, making it easier to develop Fortran applications. Despite the complexity often associated with coding, Simply Fortran boasts a clean and user-friendly interface similar to popular IDEs, making it accessible for both beginner and experienced developers. It also includes sample projects and comprehensive documentation to help you get started quickly.
The IDE maximizes your workspace for code writing, while offering helpful features like tabbed coding for working on multiple projects simultaneously. You can easily show or hide side panels to organize your project files and modules, giving you full control over your workspace. The code editor supports syntax highlighting for Fortran and other programming languages, and its auto-completion feature helps reduce errors, saving time and effort while coding.
Simply Fortran takes debugging seriously, with tools that detect a wide range of bugs and provide options to clean up your code. You can set breakpoints, add expressions to your watchlist, and even configure your toolbox with external tools to suit your needs. This ensures a smoother development process and more efficient code troubleshooting. While the IDE uses the free GNU GFortran, it may not fully support Fortran 2003 and 2008 standards. Despite this limitation, Simply Fortran remains a great choice for Fortran developers working across multiple operating systems.