title: What visualization libraries are available for Fortran?
body: <p>What visualization open sources or free software libraries are available for the Fortran programming language? Are there any similar to MatPlotLib for Python, for Fortran?
  If not, most scientists require visualization not only to generate some outputs but also to investigate data trends, which is missing in Fortran although its speed in computation is well-known.</p>
  
  <p>Note:</p>
  
  <p>This question is intended to discover available, or planned to be available, graphical libraries for Fortran. It is clearly not going to compare different packages among different programming languages.</p>
  
  <p>The flexibility, quality of outputs, interactivity, multi-dimensionality, free/open source etc are of factors to be discovered.</p>