The GUI aspect of the NAG Fortran Builder make it one of the easiest compiler environments to work in. The images shown on this page are actual screen shots of the NAG Fortran Builder in various methods of use from general project building to complex debugging.
Illustrated below is a section showing some of the compiler options. The NAG Fortran Builder will advise on the most preferable method for your scenario.
The image below features one of the Simfit plotting library programs showing a 3D and 2D contours. The NAG Fortran Library can be called into Fortran Builder and LAPACK routines are included in the software.
Illustrated below are a break point, the command line and several variable watch windows. The 'Run' menu shows the single-stepping and other options available during debugging.